Information about Krypton-81:


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

Mass-Energy Data:

Atomic Mass:	80.916592	±	0.000003	amu
Excess Mass (Δ):	-77.693650	±	0.002851	MeV
Binding Energy:	703.306075	±	0.002853	MeV
β^- Decay Energy:	-2.237212	±	0.006511	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: 7/2+
Half life: 229000 years ( 7.22266×10⁺¹² sec., λ = 9.59684×10^-14 s^-1)
Mode of decay:
E.C.
to
81
35
Br
(Q = 0.281 MeV)
Meta state at 0.190 Mev
Spin: 1/2- 229000
Half life: 13.10 s ( 13.1 sec., λ = 0.052912 s^-1)
Mode of decay: γ (IT) (Q = 0.191 MeV)
Mode of decay:
E.C.
to
81
35
Br
(Q = 0.472 MeV) Branch ratio: 0.0025 %
Possible parent nuclides:
E.C. from
81
37
Rb

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	2.3 x 10*5 y	7/2+	-0.908(2) d		[83Kr]	CFBLS	NP A586 219 (95)
			-0.909(4)		[83Kr]	LRFS	PR A47 1148 (93)
				+0.64(7)		CFBLS	NP A586 219 (95)
				+0.629(13)		LRFS	PR A47 1148 (93)
190	13.1 s	1/2-	+0.586(2) d		[83Kr]	CFBLS	NP A586 219 (95)

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