element

Information about Lead-191:


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Mass-Energy Data:

Atomic Mass:	190.978200	±	0.000230	amu #
Excess Mass (Δ):	-20.307000	±	0.214000	MeV #
Binding Energy:	1497.776000	±	0.214000	MeV #
β^- Decay Energy:	-7.315000	±	0.454000	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: (3/2-)
Half life: 1.33 min ( 79.8 sec., λ = 0.00868605 s^-1)
Mode of decay:
E.C.
to
191
81
Tl
(Q = 5.900 MeV) Branch ratio: 99.99 %
Mode of decay:
α
to
187
80
Hg
(Q = 5.410 MeV) Branch ratio: 0.01 %
Meta state at 0.138 Mev
Spin: 13/2+) 1.33
Half life: 2.18 min ( 130.8 sec., λ = 0.00529929 s^-1)
Mode of decay:
E.C.
to
191
81
Tl
(Q = 6.038 MeV)
Mode of decay:
α
to
187
80
Hg
(Q = 5.548 MeV) Branch ratio: ~0.02 %
Possible parent nuclides:
α from
195
84
Po

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
138	2.18 m	13/2+	-1.172(7)		[207Pb]	CFBLS	ZP A341 39 (91)
				+0.085(5)	[207Pb]	CFBLS	ZP A341 39 (91)

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