List of levels for 189BI

ADOPTED LEVELS, GAMMAS for ¹⁸⁹Bi

Author: Balraj Singh | Citation: ENSDF | Cutoff date: 31-AUG-2021

Authors: T.D. Johnson, Balraj Singh | Citation: Nucl. Data Sheets 142, 1 (2017) | Cutoff date: 15-Apr-2017

Full ENSDF file | Adopted Levels (PDF version)

Q(β-)=-8640 keV 30	S(n)= 10941 keV 24	S(p)= -457 keV 23	Q(α)= 7268.2 keV 27
Reference: 2021WA16

References:
A	¹⁹³At α decay (28 MS)	B	¹⁹³At α decay (21 MS)
C	¹⁹³At α decay (27 MS)	D	¹⁰⁹Ag(⁸²Kr,2nγ),(⁸³Kr,3nγ)

¹⁸⁹Bi identified by 1973Ga08 and 1974Le02 in ¹⁵⁹Tb(⁴⁰Ar,X) E=300 MeV reaction. Later decay studies of ¹⁸⁹Bi: 1984ScZQ, 1985Co06, 1993An19, 1995Ba75, 1997Wa05, 2001An11, 2003Ke08

2017Ba12 (also 2017Mo44): measured hyperfine structure using in-source laser spectroscopy with 1-GeV proton beam from the PNPI, Gatchina synchrocyclotron incident on a 40 g/cm² uranium monocarbide target. Deduced magnetic moment and mean-square charge radius of the g.s. of ¹⁸⁹Bi.

Theoretical calculations: consult NSR database at www.nndc.bnl.gov/nsr/ for 24 primary references for α decay of ¹⁸⁹Bi and ^189mBi, and one reference for nuclear structure.

Q-value: Q(ε)=7779 25, Q(εp)=4980 40, S(2n)=19824 23, S(2p)=2198 22 (2021Wa16)

E(level) (keV)	XREF	J^π(level)	T_1/2(level)	E(γ) (keV)	I(γ)	M(γ)	Final Levels
0.0	A B C D	(9/2-)	688 ms 5 % α ≈ 100
99.6 5	A B	(7/2-)	< 10 ns	99.6 5	100	M1(+E2)	0.0	(9/2-)
184 8	A	(1/2+)	5.0 ms 1 % α = 83 5 % IT = 17 5	84 8 S		[E3]	99.6	(7/2-)
357.6 5	C D	(13/2+)	886 ns 32 % IT = 100	357.6 5	100	M2	0.0	(9/2-)
778 1	D	(17/2+)		420			357.6	(13/2+)
1091 2	D	(21/2+)		313			778	(17/2+)
1466 2	D	(25/2+)		375			1091	(21/2+)
1912 2	D	(29/2+)		446			1466	(25/2+)
2422 2	D	(33/2+)		510			1912	(29/2+)
2973 3	D	(37/2+)		551			2422	(33/2+)

E(level): From Eγ data, assuming 1 keV uncertainty when not stated

J^π(level): From systematics of neighboring nuclides, except when noted otherwise

E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 1 - πi_13/2 intruder orbital band.
778 1	(17/2+)
1091 2	(21/2+)		313			778	(17/2+)
1466 2	(25/2+)		375			1091	(21/2+)
1912 2	(29/2+)		446			1466	(25/2+)
2422 2	(33/2+)		510			1912	(29/2+)
2973 3	(37/2+)		551			2422	(33/2+)

E(level) (keV)	J^π(level)	T_1/2(level)	E(γ) (keV)	Multipolarity	Mixing Ratio	Conversion Coefficient	Additional Data
99.6	(7/2-)	< 10 ns	99.6 5	M1(+E2)	0.6 LT	9.8	B(M1)(W.u.)>0.00015, α=9.8 5, α(K)=7.3 11, α(L)=1.9 5, α(M)=0.47 13, α(N)=0.120 31, α(O)=0.024 6, α(P)=0.0025 4
184	(1/2+)	5.0 ms 1 % α = 83 5 % IT = 17 5	84 8	[E3]		55×10¹	B(E3)(W.u.)=1.3 5, α=55E1 27
357.6	(13/2+)	886 ns 32 % IT = 100	357.6 5	M2		0.969	B(M2)(W.u.)=0.092 3, α=0.969, α(K)=0.738, α(L)=0.175, α(M)=0.0429, α(N)=0.01105

E(level)	J^π(level)	T_1/2(level)	Comments
0.0	(9/2-)	688 ms 5 % α ≈ 100	μ=3.72 29 (2017Ba12,2019StZV) Measured δ<r²>(¹⁸⁹Bi,²⁰⁹Bi)=-0.792 fm² 44(stat) 55(syst) (2017Ba12).
184	(1/2+)	5.0 ms 1 % α = 83 5 % IT = 17 5	Other %α=50-100 (1985Co06).
357.6	(13/2+)	886 ns 32 % IT = 100	π1i_13/2 proton state. E(level): π1i_13/2 proton state.
778	(17/2+)		E(level): πi_13/2 intruder orbital band.
1091	(21/2+)		E(level): πi_13/2 intruder orbital band.
1466	(25/2+)		E(level): πi_13/2 intruder orbital band.
1912	(29/2+)		E(level): πi_13/2 intruder orbital band.
2422	(33/2+)		E(level): πi_13/2 intruder orbital band.
2973	(37/2+)		E(level): πi_13/2 intruder orbital band.

E(level)	E(gamma)	Comments
99.6	99.6	E(γ): from ^193mAt decay (2003Ke08) M(γ): from α(K)exp=8.7 20 (2003Ke08)
184	84	E(γ): from level-energy difference
357.6	357.6	E(γ): from ^193mAt α decay (2003Ke08). Other: Eγ=357 (2001An11, from recoils-α-g correlation in ¹⁴²Nd(⁵²Cr,p4nγ), identified by the 357γ-transition having the same excitation function as the 6672 keV α-line from decay of ¹⁸⁹Bi, and in coincidence with Bi K-x rays). M(γ): from α(K)exp=0.9 1 (2001An11, from number of K-x rays and γ rays in the decay of 357.6-keV isomer, populated in ¹⁴²Nd(⁵²Cr,p4nγ))