Information about Selenium-82:


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Question from TON user: Edgar Kiefhaber (Edgar.Kiefhaber@iket.fzk.de)

What is the information included in brackets, i.e.: (+26-6)?
It says 1.08 +0.26 ~ 1.08 -0.06. The error limit is different.

Reply from Originator: Jag Tuli (tuli@bnlnd2.dne.bnl.gov)

For 82Se (2b-) ENSDF value is 1.08E+20 Y +26-6 but in my revised wallet cards
   I am going to quote 0.83E+20 Y 12. One of the problems with 2b- decay is
   there is more than one value depending upon the decay mode is 2b-0nu or
   2b-2nu (nu is neutrino), for my latest revision of Wallet Cards (in progress)
   I have decided to give the lower limit.

3 Dec 1999

Mass-Energy Data:

Atomic Mass:	81.916700	±	0.000002	amu
Excess Mass (Δ):	-77.593439	±	0.002074	MeV
Binding Energy:	712.841893	±	0.002077	MeV
β^- Decay Energy:	-0.097496	±	0.002384	MeV

"The 1995 update to the atomic mass evaluation" by G.Audi and A.H.Wapstra, Nuclear Physics A595 vol. 4 p.409-480, December 25, 1995.

Radioactive Decay Data:

Atomic Percent Abundance: 8.73%
Spin: 0+
Half life: 1.08E+20(+26-6) years ( 3.40632×10⁺²⁷ sec., λ = 2.03489×10^-28 s^-1)
Mode of decay: 2β^- to
82
36
Kr
(Q = 2.995 MeV)
Possible parent nuclides:
β^- from
82
33
As

R.R.Kinsey, et al.,The NUDAT/PCNUDAT Program for Nuclear Data,paper submitted to the 9 th International Symposium of Capture-Gamma_raySpectroscopy and Related Topics, Budapest, Hungary, Octover 1996.Data extracted from NUDAT database (Jan. 14/1999)

Magnetic Dipole Moments and Electric Quadrupole Moments
Ex(kev)	T_1/2	Spin	m(nm)	Q(b)	Ref. Std.	Method	Reference
654	11.3 ps	2+	+0.9(3)			IMPAC	NP A133 310 (69)
				-0.22(7)		CER	NP A2284 123 (77)

N. J. Stone, Table of Nuclear Magnetic Dipole and Electric Quadrupole Moments, to be published. 2000 Courtesy of T. Burrows at BNL/NNDC.