List of levels for 215BI

ADOPTED LEVELS, GAMMAS for ²¹⁵Bi

Authors: D. Abriola, P. Demetriou, B. Singh, R. Gowrishankar | Citation: Nucl. Data Sheets 114, 2023 (2013) | Cutoff date: 23-SEP-2013

Full ENSDF file | Adopted Levels (PDF version)

Q(β-)=2189 keV 15	S(n)= 5223 keV 19	S(p)= 5460 keV 15	Q(α)= 5300 keV 40
Reference: 2012WA38

References:
A	²¹⁵Pb β^- decay (147 S)	B	²¹⁵Bi IT decay (36.9 S)
C	²¹⁹At α decay (56 S)

²¹⁵Bi evaluated by d. Abriola, p. Demetriou, B. Singh, ranching. Gowrishankar, K. Vijay Sai

1953Hy83: β^- decay inferred by measurements of the α decay of the ²¹⁵Po daughter nucleus, measured half-life

1965Nu03: descendant of radioactive source ²²⁷Ac. Measured T_1/2

1990Ru02: source produced by spallation of 200-MeV protons on targets of ²³²Th. ²¹⁵Bi(7.6 min) activity was identified by mass separation and by the observation of known γ rays in the daughter nucleus ²¹⁵Po. Measured T_1/2. The β^- particles were detected in a 4π plastic scintillator

2008We02: precise mass measurement using ISOLTRAP Penning-trap mass spectrometer

Q-value: S(2n)=9264 16, S(2p)=14710 30 (2012Wa38)

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	(9/2-)	7.6 m 2 % β^- = 100
183.5 3	A	(7/2-)		183.5 3	100	M1	0.0	(9/2-)
746.60 10 ?	B	(13/2-)		746.6 1	100	(E2)	0.0	(9/2-)
854.5 10	A			671 1	100		183.5	(7/2-)
1022.5 10	A			839 1	100		183.5	(7/2-)
1160.70 14 ?	B	(17/2-)		414.1 1	100	(E2)	746.60	(13/2-)
1168.5 10	A			985 1	100		183.5	(7/2-)
1199.8 7	A			1016 1 1200 1	82 30 100 65		183.5 0.0	(7/2-) (9/2-)
1347.50 17	B	(21/2-)		186.8 1	100	(E2)	1160.70	(17/2-)
1347.50+X	B	(25/2:29/2)(-)	36.9 s 6 % IT = 76.9 5 % β^- = 23.1 5	X			1347.50	(21/2-)
1959.8 12	A			760 1	100		1199.8

E(level): From Eγ data

E(level) (keV)	J^π(level)	T_1/2(level)	E(γ) (keV)	Multipolarity	Conversion Coefficient	Additional Data
183.5	(7/2-)		183.5 3	M1	1.82	α=1.82 3, α(K)=1.478 22, α(L)=0.258 4, α(M)=0.0606 9, α(N)=0.01550 23
746.60	(13/2-)		746.6 1	(E2)	0.01258	α=0.01258, α(K)=0.00962 14, α(L)=0.00224 4
1160.70	(17/2-)		414.1 1	(E2)	0.0491	α=0.0491, α(K)=0.0320 5, α(L)=0.01282 18, α(M)=0.00325 5
1347.50	(21/2-)		186.8 1	(E2)	0.571	α=0.571, α(K)=0.195 3, α(L)=0.280 4, α(M)=0.0737 11, α(N)=0.0188 3

E(level)	J^π(level)	T_1/2(level)	Comments
0.0	(9/2-)	7.6 m 2 % β^- = 100	<r²>^1/2=5.552 fm 3 (extrapolation from ²⁰⁹Bi value using formula (4) in 2004An14).
746.60	(13/2-)		E(level): The ordering of the 187-414-747 cascade is not established, the one given here is just one of the possibilities. Thus the positions of the intermediate levels at 747 and 1161 could be different. J^π(level): E2 --> (E2) --> (E2) γ cascade feeding (9/2-) g.s. suggests (21/2-) --> (17/2-) --> (13/2-) spin-parity sequence.
1160.70	(17/2-)		E(level): The ordering of the 187-414-747 cascade is not established, the one given here is just one of the possibilities. Thus the positions of the intermediate levels at 747 and 1161 could be different. J^π(level): E2 --> (E2) --> (E2) γ cascade feeding (9/2-) g.s. suggests (21/2-) --> (17/2-) --> (13/2-) spin-parity sequence.
1347.50	(21/2-)		J^π(level): E2 --> (E2) --> (E2) γ cascade feeding (9/2-) g.s. suggests (21/2-) --> (17/2-) --> (13/2-) spin-parity sequence.

E(level)	E(gamma)	Comments
183.5	183.5	M(γ): from measured α(K)exp in ²¹⁵Pb β^- decay. Some E2 admixture is possible
746.60	746.6	M(γ): From γ intensity balance in 187-414-747 γ cascade in IT decay. See details in ²¹⁵Bi IT decay dataset
1160.70	414.1	M(γ): From γ intensity balance in 187-414-747 γ cascade in IT decay. See details in ²¹⁵Bi IT decay dataset
1347.50	186.8	M(γ): from measured α(K)exp in ²¹⁵Bi IT decay
1347.50+X	X	E(γ): x=40 +80-40 (2003Ku26). There may be one or more γ transitions from the isomer, but each should be lower than 80 keV. from non-observation of Bi K-x rays in coin with 186.8γ.