Information about Krypton-85:


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

Krypton-85 is used in indicator lights in appliances like clothes washer and dryers, stereos and coffee makers... to gauge the thickness of thin plastics and sheet metal, rubber, textiles and paper... and to measure dust and pollutant levels.

Mass-Energy Data:

Atomic Mass:	84.912527	±	0.000003	amu
Excess Mass (Δ):	-81.480605	±	0.002981	MeV
Binding Energy:	739.378321	±	0.002983	MeV
β^- Decay Energy:	0.687083	±	0.001949	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: 9/2+
Half life: 3934.4 days ( 3.39932×10⁺⁰⁸ sec., λ = 2.03908×10^-09 s^-1)
Mode of decay:
β^-
to
85
37
Rb
(Q = 0.687 MeV)
Meta state at 0.305 Mev
Spin: 1/2- 3934.4
Half life: 4.480 h ( 16128 sec., λ = 4.29779×10^-05 s^-1)
Mode of decay:
β^-
to
85
37
Rb
(Q = 0.992 MeV) Branch ratio: 78.60 %
Mode of decay: γ (IT) (Q = 0.305 MeV) Branch ratio: 21.40 %
Possible parent nuclides:
β^- from
85
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	10.76 y	9/2+	-1.005(2) d		[83Kr]	CFBLS	NP A586 219 (95)
			1.005(2)		[83Kr]	O	ZP 141 160 (55)
			-1.0055(4)		[83Kr]	LRFS	PR A47 1148 (93)
				+0.44(5)		CFBLS	NP A586 219 (95)
				+0.433(8)		LRFS	PR A47 1148 (93)
305	4.48 h	1/2-	+0.633(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.