File: "C14-L LOG9511" UofA LISTSERV Server (14.5) [LISTSERV@LISTSERV.ARIZONA.EDU] Sent: Friday, December 14, 2012 12:44 PM To: Xiluri-Lauria, Kiriaki - (kxiluri) ========================================================================= Date: Wed, 1 Nov 1995 13:00:27 -0800 Reply-To: Radiocarbon Mailing List Sender: Radiocarbon Mailing List From: Robert Holloway Subject: liquid scintillation counter I am looking for a used liquid scintillation counter, preferably a Packard. Also, if anyone is looking for employment, I will post a brief abstract of your resume on my web page at no charge. The web pages are at the following address: http://www.ntanet.net/ Robert Holloway Nevada Technical Associates, 702-564-2798 ========================================================================= Date: Fri, 3 Nov 1995 10:09:36 -0700 Reply-To: Radiocarbon Mailing List Sender: Radiocarbon Mailing List From: Ian Campbell Subject: lab for smallest samples? Which lab is best for extremely small samples for C-14? How much do they need, and how much do they charge? We are looking at early postglacial sediments in which me may have to hand-pick pollen grains one at a time to pull togather a sample for dating. Please send replies to: campbelc@geog.ualberta.ca Thanks. ========================================================================= Date: Sat, 4 Nov 1995 05:43:28 -0800 Reply-To: gdoudna@ednet1.osl.or.gov Sender: Radiocarbon Mailing List From: Greg Doudna Subject: Half-life correction I wish to report a current calibrated calendar date or date range for a radiocarbon result obtained in 1951. The 1951 result is a date from Libby at UChicago for linen wrapping associated with the Dead Sea Scrolls. Libby reported 1917 BP +/- 200. In c. 1962 there was the half-life correction from 5568 to 5730 BP and the 1.03x correction recommendation. That would appear to move the 1951 linen date range slightly earlier. However, running 1917 BP on CALIB gives a slightly later calibrated calendar date than the 33 A.D. +/- 200 originally reported. In the back cover of _Radiocarbon_ in "Notice to Readers and Contributors" there is a note that "All dates published in this volume (as in previous volumes) are based on the Libby value, 5568 yr, for the half-life"--that is, the OLD figure. This notice appears also in the 1993 calibration issue. When I look up 5568 BP on the Stuiver and Pearson chart the cal BP comes out to about 6350--no relationship to any 1.03x correction. I would like to understand both how to report Libby's 1951 date in terms of current calibration (I am actually using CALIB based on 1986 Stuiver and Pearson), and why it is that this is not making sense. I might mention that articles in the Dead Sea Scrolls field in the past have said the original Libby date for the linen goes a little *older* (not the younger that I get from CALIB) than originally reported, by a few decades. As is no doubt evident by now, I am not a radiocarbon professional--only a baffled user with what I am sure is not a new question! My thanks in advance-- Greg Doudna gdoudna@ednet1.osl.or.gov -- ========================================================================= Date: Sun, 5 Nov 1995 13:38:12 MEZ Reply-To: Radiocarbon Mailing List Sender: Radiocarbon Mailing List From: Andreas Naermann Organization: Universitaet Osnabrueck, FB Physik Subject: Lifetime of 14N^- We are currently working on an experimental determination of the lifetime of N- (which is expected to be approx. 100 ns) using a time-of-flight setup. I am searching for some references or other pointers to relevant information concerning the importance (if any) of the lifetime of N- to the C14 community. I vaguely remember having read something about the interference of the C14 signal with the N14 signal in mass spectrometry. Any hints are welcome. Andreas Naermann ========================================================================= Date: Mon, 6 Nov 1995 13:14:20 +1200 Reply-To: Radiocarbon Mailing List Sender: Radiocarbon Mailing List From: "Sparks, Rodger" Subject: Lifetime of 14N^- - Reply A good estimate of the 14N- lifetime would be interesting to the AMS 14C community but I do not think it is regarded as a major issue for most cases. For example, in our system the transit time for a mass 14 ion from the source to the accelerator is a bit under 8 microsec, so a mean life of .1 microsec does pose too serious a threat. More of a worry is N14 injected as a tail of N14H-. But hey, don't look for reasons, it's nice physics! Rodger Sparks R.SPARKS@GNS.CRI.NZ ========================================================================= Date: Mon, 6 Nov 1995 23:59:43 -0400 Reply-To: csmem2@abello.dic.uchile.cl Sender: Radiocarbon Mailing List From: Manuel Arroyo Subject: RC14 Rock art Does anyone know if it is possible to date rock paintings executed using charcoal as paint. If so, how large should the sample be, what kind of treatment would be required? Manuel Arroyo csmem2@abello.dic.uchile.cl ========================================================================= Date: Tue, 7 Nov 1995 17:59:41 +1100 Reply-To: Radiocarbon Mailing List Sender: Radiocarbon Mailing List From: Claudio Tuniz Subject: RC14 Rock art --Reply Recently we dated some charcoal drawings from Chillagoe rock art, North Queensland, Australia. Charcoal samples scraped from limestone were pretreated with 2M of ACl for 6-7 hours at 80 degree, then for 15 hours at room temperature. Samples were then washed in deionised water until free of acid and placed in oven to dry at 60 degree for 2 days. The mass of the samples after this pretreatment was in the range 0.7 - 3 mg producing a carbon mass in the range 0.14 - 1 mg. Claudio Tuniz tuniz@nucelus.ansto.gov.au ========================================================================= Date: Tue, 7 Nov 1995 12:43:43 -0500 Reply-To: Radiocarbon Mailing List Sender: Radiocarbon Mailing List From: Nikolaas VanderMerwe Subject: Re: RC14 Rock art Comments: To: Manuel Arroyo In-Reply-To: Yes, it is possible to date such paintings. See: NJ van der Merwe, JC Sealy an R Yates, 1987, First accelerator carbon-14 date for pigment from a rock painting, South African Journal of Science 83:56-57. The requirements are the same as for all AMS dates, which are best checked with the lab you want to use. Nick van der Merwe, Peabody Museum, Harvard. On Mon, 6 Nov 1995, Manuel Arroyo wrote: > Does anyone know if it is possible to date rock paintings executed using > charcoal as paint. If so, how large should the sample be, what kind of > treatment would be required? > > Manuel Arroyo > csmem2@abello.dic.uchile.cl > ========================================================================= Date: Wed, 8 Nov 1995 16:04:00 +1200 Reply-To: Radiocarbon Mailing List Sender: Radiocarbon Mailing List From: "Beavan, Nancy" Subject: Re: RC14 Rock art At the Rafter AMS Lab at GNS (NZ) we recently treated and dated a small sample of charcoal paint from a rock art site from NW Queensland. A 5.7mg sample of charcoal paint from a substrate identified by the submitter as kaolinite was treated with a cold acid wash (0.5N HCL) @ room temp for 20 minutes, then rinsed to neutral and dried in a 30 degree C vacuum oven. The resultant 2.7mg sample was combusted in a sealed tube and processed to purify the CO2 gas. The yield was 0.878mg carbon (32.5% of treated sample wt), sufficient to make a small target for AMS. An article that might also be of interest : Russ, etal (1992) Direct Radiocarbon Dating of Rock Art_Radiocarbon_ 34(3):867-72. Nancy Beavan n.beavan@gns.cri.nz ========================================================================= Date: Mon, 13 Nov 1995 14:43:18 -0700 Reply-To: Radiocarbon Mailing List Sender: Radiocarbon Mailing List From: David Sewell Subject: C14-L list security Dear C14-L (radiocarbon) list subscribers, Over the weekend, C14-L received a "subscribe" message from a user whose only intent was to be able to retrieve a list of names of C14-L subscribers using the Listserv "REVIEW" command. The same user did this to hundreds of other open-subscription Listserv lists. The apparent reason was to gather names for a database of Internet e-mail addresses owned by an "address lookup" company that hopes to attract advertisers by offering a World-Wide-Web service with which people can search for e-mail addresses for people whose names they know. The company's WWW material appears to prohibit customers or advertisers from using the addresses it has gathered for the purpose of sending unsolicited commercial e-mail, but whether or not they intend to honor the prohibition themselves is anyone's guess. In any case, I consider the company's method of gathering addresses from Listservs unethical. Many of you may not want your e-mail address published to the world at large. If you don't, please send me personal e-mail (DON'T use the "reply" function of your mail reader or it will go to the whole list) to let me know, and I will send the company a letter requesting that the addresses in question be deleted from their database. (If you are on other Listserv lists or have ever posted to a Usenet group, chances are they have your address even without the C14-L list.) If you want to see the lookup service to help decide whether or not you want to be listed, its URL is http://www.iaf.net/ . I have changed the software options for C14-L so that subscribing can no longer be done automatically. I'm sorry about this, but I'm afraid it is a taste of things to come, now that the media has given a lot of get-rich-quick types the idea that the Internet is a mountain of gold. David Sewell dsew@packrat.aml.arizona.edu C14-L list administrator ========================================================================= Date: Tue, 14 Nov 1995 09:38:59 GMT Reply-To: Radiocarbon Mailing List Sender: Radiocarbon Mailing List From: "A.Bayliss" ANNOUNCEMENT English Heritage has recently funded a detailed reassessment of the 20th century excavations at STONEHENGE. As part of this programme a series of new radiocarbon dates were commissioned. These results and their analysis have enabled us to determine the chronology of the Monument much more reliably. Details of the dating programme are available on: http://www.eng-h.gov.uk/stoneh This gives an outline of the main results of the programme, along with full technical details. Alex Bayliss Scientific Dating Co-ordinator English Heritage alex@eng-h.gov.uk 23, Savile Row, +44-171-973-3299 (tel) London, W1X 1AB +44-171-973-3330 (fax) UNITED KINGDOM ========================================================================= Date: Tue, 14 Nov 1995 13:01:00 MST Reply-To: Radiocarbon Mailing List Sender: Radiocarbon Mailing List From: Bill Doleman Subject: C14-L list security On Mon, 13 Nov 1995, David Sewell wrote: > Dear C14-L (radiocarbon) list subscribers, > > Over the weekend, C14-L received a "subscribe" message from a user whose > only intent was to be able to retrieve a list of names of C14-L > subscribers using the Listserv "REVIEW" command. The same user did this > to hundreds of other open-subscription Listserv lists. > << *** SNIP *** {please read on . . . } >> > > Many of you may not want your e-mail address > published to the world at large. If you don't, please send me > personal e-mail (DON'T use the "reply" function of your mail reader or > it will go to the whole list) to let me know, and I will send the > company a letter requesting that the addresses in question be deleted > from their database. > > If you want to see the lookup service to help decide whether or not > you want to be listed, its URL is http://www.iaf.net/ . > << *** SNIP *** {ditto} >> > The following is from iaf.net's FAQ (avail at the above www site): > Q: How do I remove my name from the IAF database? > > A: You have the ability to remove your name, but only your name, > by sending an email message to remove@iaf.net. > You must mail the message from the email account you wish to remove. > Please allow 24 hours for processing the request. > You are still able to use IAF by registering and then by sending email to > remove@iaf.net. If you don't like the idea, you can save Dave Sewell the trouble by e-mailing iaf to remove your name. Sincerely, Bill Doleman =|8-O> (Mr. Bill as A. Lincoln) ========================================================================= Date: Thu, 16 Nov 1995 09:56:52 -0500 Reply-To: Radiocarbon Mailing List Sender: Radiocarbon Mailing List From: Steve Kite Organization: West Virginia Network Subject: iaf Please remove see to it that my name is removed from any outside mailing lists. Is there any way to set up listserver so that replys go to the originator unless specified otherwise. I am rather tired of personal messages to other clogging up my e-mail. Steve Kite ========================================================================= Date: Thu, 16 Nov 1995 10:39:32 -0800 Reply-To: Radiocarbon Mailing List Sender: Radiocarbon Mailing List From: Thomas A Brown Subject: Please do not send personal messages by replying to the 14C-L list server >Date: Thu, 16 Nov 1995 09:56:52 -0500 >Reply-To: Radiocarbon Mailing List >Sender: Radiocarbon Mailing List >From: Steve Kite >Organization: West Virginia Network >Subject: iaf >To: Multiple recipients of list C14-L >Please remove see to it that my name is removed from any outside mailing >lists. >Is there any way to set up listserver so that replys go to the originator >unless specified otherwise. I am rather tired of personal messages to other >clogging up my e-mail. >Steve Kite In response to the above I would suggest that, rather than asking David to spend time changing the set-up of the list server, people should read the documentation they received when they subscribed to the 14C-L listserver. There is a clear description of how to avoid having replys directed to one person go to the entire subscribers list. Tom Brown. ========================================================================= Date: Wed, 29 Nov 1995 11:55:32 +1200 Reply-To: Radiocarbon Mailing List Sender: Radiocarbon Mailing List From: Tom Higham Subject: Calibeth I have a version of the calibration programme CalibETH produced by the Swiss AMS group. The version 1.5 b is dated 1991. Does anyone know whether there have been further updated versions released? Thanks, --------------------------------------------------------------------------- Dr Thomas Higham, * Email: Thigham@waikato.ac.nz Research Officer-Archaeological Dating * Phone: +(64) 07 838 4278 Radiocarbon Dating Laboratory, * GlobalFax: +(64) 7 838 4192 University of Waikato, * WWW: Radiocarbon WEB-info - Hamilton, * http://www2/waikato.ac.nz/c14/ NEW ZEALAND. * webinfo/index.html --------------------------------------------------------------------------- Previous Item Next Item