========================================================================= Date: Wed, 16 May 2007 14:33:09 -0400 Reply-To: Radiocarbon Mailing List Sender: Radiocarbon Mailing List From: Mark McClure Subject: Smithsonian Institution MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00C1_01C797C7.20F12870" This is a multi-part message in MIME format. ------=_NextPart_000_00C1_01C797C7.20F12870 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Dear All, I am trying to trace the methods of dating of a series of samples processed by the Smithsonian Institution, probably in the late 1970s. These are Si-1450 and thereabouts. The latest Radiocarbon datelists suggest hot alkali and acid, followed by gas proportional counting of methane (Stuckenrath and Mielke 1973; Mielke and Long 1969). Does anyone know whether these methods were still current for measurements made at this time? Thanks for any help you can provide. Alex Bayliss English Heritage Alex.Bayliss@english-heritage.org.uk =========================================================================== To unsubscribe from this list, send the command SIGNOFF C14-L to LISTSERV@LISTSERV.ARIZONA.EDU, or send a request to C14-L-request@LISTSERV.ARIZONA.EDU. ------=_NextPart_000_00C1_01C797C7.20F12870 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Dear All,

I am trying to trace the methods of dating of = a series of samples processed by the Smithsonian Institution, probably in = the late 1970s. These are Si-1450 and thereabouts. The latest Radiocarbon = datelists suggest hot alkali and acid, followed by gas proportional counting of = methane (Stuckenrath and Mielke 1973; Mielke and Long 1969).

Does anyone know whether these methods were = still current for measurements made at this time?

Thanks for any help you can = provide.

Alex Bayliss

English Heritage

Alex.Bayliss@english= -heritage.org.uk

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D To unsubscribe from this list, send the command SIGNOFF C14-L to LISTSERV@LISTSERV.ARIZONA.EDU, or send a request to C14-L-request@LISTSERV.ARIZONA.EDU. ------=_NextPart_000_00C1_01C797C7.20F12870-- ========================================================================= Date: Tue, 29 May 2007 14:48:57 -0400 Reply-To: Radiocarbon Mailing List Sender: Radiocarbon Mailing List From: Mark McClure Subject: Animation of C-14 decay MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Hello all, For a workshop Dr. Maarten Blaauw gave recently, he produced an animation of the decay of 14C atoms in a sample. This animation might perhaps be of interest for the C14-L list. You can see the animation at (Flash Player needed): http://www.anst.uu.se/maabl971/wiggles/C14decay.html Best, Mark McClure -- Dr. Maarten Blaauw Department of Archaeology & Palaeoecology, Queen's University Belfast, UK *on leave from Department of Earth Sciences, Uppsala University, Sweden mail maarten.blaauw@geo.uu.se www http://www.anst.uu.se/maabl971/ tel +44 (0)28 9097 3895 =========================================================================== To unsubscribe from this list, send the command SIGNOFF C14-L to LISTSERV@LISTSERV.ARIZONA.EDU, or send a request to C14-L-request@LISTSERV.ARIZONA.EDU.