Information about Selenium-77:


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

Mass-Energy Data:

Atomic Mass:	76.919915	±	0.000002	amu
Excess Mass (Δ):	-74.599049	±	0.001480	MeV
Binding Energy:	669.490889	±	0.001484	MeV
β^- Decay Energy:	-1.365116	±	0.002799	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: 7.63%
Spin: 1/2-
Stable Isotope
Meta state at 0.161 Mev
Spin: 7/2+
Half life: 17.36 s ( 17.36 sec., λ = 0.0399278 s^-1)
Mode of decay: γ (IT) (Q = 0.162 MeV)
Possible parent nuclides:
β^- from
77
33
As

E.C. from
77
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	stable	1/2-	+0.5350422(6)		[23Na]	N	ZNat 33a 1025 (78)/ PR 89 923 (53)
			0.5350743(3)		[1H]	N	ZNat 33a 1025 (78)
250	9.56 ns	5/2-	+1.12(3)			TDPAC	JP G10 1571 (84)
				1.1(5)		TDPAC	HFI 14 119 (83)
439	24 ps	5/2-	+1.0(3)			IMPAC	Cf69Heid 419 (69)

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