List of levels for 248CF

ADOPTED LEVELS, GAMMAS for ²⁴⁸Cf

Author: C.D. Nesaraja | Citation: Nucl. Data Sheets 204, 374 (2025) | Cutoff date: 30-Jun-2024

Full ENSDF file | Adopted Levels (PDF version)

Q(β-)=-3060 keV SY	S(n)= 6943 keV 15	S(p)= 5541 keV 7	Q(α)= 6361 keV 5
Reference: 2021WA16

References:
A	²⁴⁸Bk β^- decay (23.7 H)	B	²⁵²Fm α decay
C	²⁴⁹Cf(d,t)	D	²⁴⁹Cf(¹⁸O,¹⁹OG)

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	0+	333.5 d 28 % α = 99.9971 3 % SF = 0.0029 3
41.53 6	A B C D	2+		41.53 6	100		0.0	0+
137.81 9	B C D	4+		96.28 6	100		41.53	2+
287.51 13	B C D	6+		149.7 1	100	(E2)	137.81	4+
488.11 17	C D	8+		200.6 1	100	(E2)	287.51	6+
592.23 12	A C D	2-	4.64 ns 14	550.7 1	100	E1	41.53	2+
630 1	C D	3-
677 1	C D	4-
735 1	C D	5-
737.4 5	D	10+		249.3 5	100		488.11	8+
779 2	C
806 1	C D	6-
885 1	C D	7-
0.90E3 30 ?	D		> 139 ns
947.80 10 ?	D		11.64 ns 35	47.8 1	100	E1	0.90E3
979 2	C D	8-
1021.83 32	C D			429.6 3 ?	100		592.23	2-
1048 2	C
1079 2	C
1112 2	C
1179 2	C
1261 2	C	8-
1293 2	C
1319.2 10	C D			727?	100		592.23	2-
1351 2	C	9-
1408.90 14	C D			461.1 1	100		947.80
1432 2	C
1463 1	C	5-
E(level) (keV)	XREF	J^π(level)	T_1/2(level)	E(γ) (keV)	I(γ)	M(γ)	Final Levels
1477 2	C D	2-
1507.2 10	C D	3-		915?	100		592.23	2-
1530 1	C	6-
1556.0 10	C D	4-		926?	100		630	3-
1571.6 5 ?	D			979.4 5 ?	100		592.23	2-
1577 1	C	7-
1605 1	C	7-
1621 1	C	5-
1634.2 6 ?	D			1042.0 6 ?	100		592.23	2-
1640 1	C	4-
1663 1	C	8-
1686 3	C	6-
1698 2	C	5-
1731 2	C	8-
1766 2	C	6-
1781 3	C	9-
1839 3	C	(9-)
1852 1	C	7-
1927 1	C	5+
1946 3	C	8-
1968 1	C
1992 1	C	6+
2018 3	C
2072 1	C	4+
2105 1	C	(4-)
2131 1	C	5+
2161 2	C	(5-)
2184 2	C	6-
2207 1	C	6+
2241 1	C	7+
E(level) (keV)	XREF	J^π(level)	T_1/2(level)	E(γ) (keV)	I(γ)	M(γ)	Final Levels
2262 1	C	(7-)
2281 2	C	2+
2314 2	C	3+
2368 2	C	(4+)
2404 2	C	(5+)
2463 2	C
2495.2 14	C D			1176?	100		1319.2
2512 1	C	3+
2533 1	C
2557 1	C	4+
2580 1	C
2602 1	C	6+
2634 2	C	(5+)
2682 2	C	(7+)

E(level): Except where noted otherwise, the energies are from (d,t) and gamma data

J^π(level): Except where noted otherwise, the Jπ assignments are from (d,t) based on band assignments, which in turn are based on a comparison of experimental and calculated cross sections at 90, 120, and 135 degrees.

E(γ): Except where noted otherwise, the energies are from (¹⁸O,¹⁹Oγ)

E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 1 - Kπ=0⁺ g.s. band
0.0	0+	333.5 d 28 % α = 99.9971 3 % SF = 0.0029 3
41.53 6	2+		41.53 6	100		0.0	0+
137.81 9	4+		96.28 6	100		41.53	2+
287.51 13	6+		149.7 1	100	(E2)	137.81	4+
488.11 17	8+		200.6 1	100	(E2)	287.51	6+
737.4 5	10+		249.3 5	100		488.11	8+
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 2 - Kπ=2- 9/2-[734],5/2⁺[622] band
592.23 12	2-	4.64 ns 14
630 1	3-
677 1	4-
735 1	5-
806 1	6-
885 1	7-
979 2	8-
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 3 - Kπ=8- 9/2-[734],7/2⁺[624] band
1261 2	8-
1351 2	9-
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 4 - Kπ=5- 9/2-[734],1/2⁺[631] band
1463 1	5-
1530 1	6-
1605 1	7-
1731 2	8-
1839 3	(9-)
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 5 - Kπ=2- 9/2-[734],5/2⁺[622] band
1477 2	2-
1507.2 10	3-		915?	100		592.23	2-
1556.0 10	4-		926?	100		630	3-
1621 1	5-
1686 3	6-
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 6 - Kπ=7- 9/2-[734],5/2⁺[622] band
1577 1	7-
1663 1	8-
1781 3	9-
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 7 - Kπ=4- 9/2-[734],1/2⁺[631] band
1640 1	4-
1698 2	5-
1766 2	6-
1852 1	7-
1946 3	8-
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 8 - Kπ=5⁺ 9/2-[734],1/2-[501] band
1927 1	5+
1992 1	6+
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 9 - Kπ=4⁺ 9/2-[734],1/2-[501] band
2072 1	4+
2131 1	5+
2207 1	6+
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 10 - Kπ=(3-) 9/2-[734],3/2⁺[631] band
2105 1	(4-)
2161 2	(5-)
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 11 - Kπ=6- 9/2-[734],3/2⁺[631] band
2184 2	6-
2262 1	(7-)
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 12 - Kπ=7⁺ 9/2-[734],5/2-[503] band
2241 1	7+
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 13 - Kπ=2⁺ 9/2-[734],5/2-[503] band
2281 2	2+
2314 2	3+
2368 2	(4+)
2404 2	(5+)
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 14 - Kπ=3⁺ 9/2-[734],3/2-[501] band
2512 1	3+
2557 1	4+
2634 2	(5+)
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 15 - Kπ=6⁺ 9/2-[734],3/2-[501] band
2602 1	6+
2682 2	(7+)

E(level) (keV)	J^π(level)	T_1/2(level)	E(γ) (keV)	Multipolarity	Conversion Coefficient	Additional Data
287.51	6+		149.7 1	(E2)	3.69	α=3.69 5, α(K)=0.1479 21, α(L)=2.55 4, α(M)=0.726 10, α(N)=0.2043 29, α(O)=0.0507 7, α(P)=0.00821 12, α(Q)=4.46×10^-5 6
488.11	8+		200.6 1	(E2)	1.129	α=1.129 16, α(K)=0.1403 20, α(L)=0.714 10, α(M)=0.2018 29, α(N)=0.0567 8, α(O)=0.01410 20, α(P)=0.002318 33, α(Q)=1.792×10^-5 25
592.23	2-	4.64 ns 14	550.7 1	E1	0.01365	B(E1)(W.u.)=2.18E-7 7, α=0.01365 19, α(K)=0.01086 15, α(L)=0.002093 29, α(M)=0.000508 7, α(N)=0.0001398 20, α(O)=3.59E-5 5, α(P)=6.70E-6 9, α(Q)=3.47E-7 5
947.80		11.64 ns 35	47.8 1	E1	1.000	B(E1)(W.u.)=6.74E-5 21, α=1.000 15, α(L)=0.744 11, α(M)=0.1896 29, α(N)=0.0517 8, α(O)=0.01253 19, α(P)=0.001857 28, α(Q)=4.80E-5 7

E(level)	J^π(level)	T_1/2(level)	Comments
0.0	0+	333.5 d 28 % α = 99.9971 3 % SF = 0.0029 3	E(level): Kπ=0⁺ g.s. band.
41.53	2+		E(level): Kπ=0⁺ g.s. band.
137.81	4+		E(level): Kπ=0⁺ g.s. band.
287.51	6+		E(level): Kπ=0⁺ g.s. band.
488.11	8+		E(level): Kπ=0⁺ g.s. band.
592.23	2-	4.64 ns 14	E(level): Kπ=2- 9/2-[734],5/2⁺[622] band.
630	3-		E(level): Kπ=2- 9/2-[734],5/2⁺[622] band.
677	4-		E(level): Kπ=2- 9/2-[734],5/2⁺[622] band.
735	5-		E(level): Kπ=2- 9/2-[734],5/2⁺[622] band.
737.4	10+		E(level): Kπ=0⁺ g.s. band.
806	6-		E(level): Kπ=2- 9/2-[734],5/2⁺[622] band.
885	7-		E(level): Kπ=2- 9/2-[734],5/2⁺[622] band.
979	8-		E(level): Kπ=2- 9/2-[734],5/2⁺[622] band.
1021.83			XREF: d(?).
1261	8-		E(level): Kπ=8- 9/2-[734],7/2⁺[624] band.
1351	9-		E(level): Kπ=8- 9/2-[734],7/2⁺[624] band.
1408.90			XREF: d(1.40×10³).
1463	5-		E(level): Kπ=5- 9/2-[734],1/2⁺[631] band.
1477	2-		E(level): Kπ=2- 9/2-[734],5/2⁺[622] band.
1507.2	3-		E(level): Kπ=2- 9/2-[734],5/2⁺[622] band.
1530	6-		E(level): Kπ=5- 9/2-[734],1/2⁺[631] band.
1556.0	4-		E(level): Kπ=2- 9/2-[734],5/2⁺[622] band.
1577	7-		E(level): Kπ=7- 9/2-[734],5/2⁺[622] band.
1605	7-		E(level): Kπ=5- 9/2-[734],1/2⁺[631] band.
1621	5-		E(level): Kπ=2- 9/2-[734],5/2⁺[622] band.
E(level)	J^π(level)	T_1/2(level)	Comments
1640	4-		E(level): Kπ=4- 9/2-[734],1/2⁺[631] band.
1663	8-		E(level): Kπ=7- 9/2-[734],5/2⁺[622] band.
1686	6-		E(level): Kπ=2- 9/2-[734],5/2⁺[622] band.
1698	5-		E(level): Kπ=4- 9/2-[734],1/2⁺[631] band.
1731	8-		E(level): Kπ=5- 9/2-[734],1/2⁺[631] band.
1766	6-		E(level): Kπ=4- 9/2-[734],1/2⁺[631] band.
1781	9-		E(level): Kπ=7- 9/2-[734],5/2⁺[622] band.
1839	(9-)		E(level): Kπ=5- 9/2-[734],1/2⁺[631] band.
1852	7-		E(level): Kπ=4- 9/2-[734],1/2⁺[631] band.
1927	5+		E(level): Kπ=5⁺ 9/2-[734],1/2-[501] band.
1946	8-		E(level): Kπ=4- 9/2-[734],1/2⁺[631] band.
1992	6+		E(level): Kπ=5⁺ 9/2-[734],1/2-[501] band.
2072	4+		E(level): Kπ=4⁺ 9/2-[734],1/2-[501] band.
2105	(4-)		E(level): Kπ=(3-) 9/2-[734],3/2⁺[631] band.
2131	5+		E(level): Kπ=4⁺ 9/2-[734],1/2-[501] band.
2161	(5-)		E(level): Kπ=(3-) 9/2-[734],3/2⁺[631] band.
2184	6-		E(level): Kπ=6- 9/2-[734],3/2⁺[631] band.
2207	6+		E(level): Kπ=4⁺ 9/2-[734],1/2-[501] band.
2241	7+		E(level): Kπ=7⁺ 9/2-[734],5/2-[503] band.
2262	(7-)		E(level): Kπ=6- 9/2-[734],3/2⁺[631] band.
2281	2+		E(level): Kπ=2⁺ 9/2-[734],5/2-[503] band.
2314	3+		E(level): Kπ=2⁺ 9/2-[734],5/2-[503] band.
2368	(4+)		E(level): Kπ=2⁺ 9/2-[734],5/2-[503] band.
2404	(5+)		E(level): Kπ=2⁺ 9/2-[734],5/2-[503] band.
2512	3+		E(level): Kπ=3⁺ 9/2-[734],3/2-[501] band.
E(level)	J^π(level)	T_1/2(level)	Comments
2557	4+		E(level): Kπ=3⁺ 9/2-[734],3/2-[501] band.
2602	6+		E(level): Kπ=6⁺ 9/2-[734],3/2-[501] band.
2634	(5+)		E(level): Kπ=3⁺ 9/2-[734],3/2-[501] band.
2682	(7+)		E(level): Kπ=6⁺ 9/2-[734],3/2-[501] band.

E(level)	E(gamma)	Comments
41.53	41.53	E(γ): from ²⁵²Fm α decay
137.81	96.28	E(γ): from ²⁵²Fm α decay
287.51	149.7	M(γ): from gamma-ray asymmetry in (¹⁸O,¹⁹Oγ)
488.11	200.6	M(γ): from gamma-ray asymmetry in (¹⁸O,¹⁹Oγ)
947.80	47.8	M(γ): from conversion coefficent data in ²⁴⁸Cf β^- decay