Information about Selenium-75:


Wikipedia	Neutron Cross Sections	X-Ray Transitions	X-Ray Attenuation

Selenium-75 is used in protein studies in life science research.

Mass-Energy Data:

Atomic Mass:	74.922524	±	0.000002	amu
Excess Mass (Δ):	-72.168818	±	0.001503	MeV
Binding Energy:	650.918013	±	0.001507	MeV
β^- Decay Energy:	-3.030000	±	0.013608	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:

Spin: 5/2+
Half life: 119.79 days ( 1.03499×10⁺⁰⁷ sec., λ = 6.69717×10^-08 s^-1)
Mode of decay:
E.C.
to
75
33
As
(Q = 0.864 MeV)
Possible parent nuclides:
E.C. from
75
35
Br

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
0	118.5 d	5/2+	0.67(4)			NMR/ON	PR B10 1075 (74)
				1.1(2)		"MA, R"	PR 98 1224 (55)
				Q/Q(79Se(gs))=1.2578(6)		"MA, R"	PR 98 1224 (55)

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