List of levels for 247CM

Author: C. D. Nesaraja | Citation: Nucl. Data Sheets 125, 395 (2015) | Cutoff date: 31-Mar-2014

Identification:

1954St33: ²⁴⁷Cm produced by irradiating Pu samples with neutrons followed by chemical purification and mass separation. Half-life determined by 1971Fi01, 1968Fi03, 1963Fi08

Theoretical studies:

2012Ni16: α decay T_1/2 for transitions from ground-state to favored rotational bands using Multichannel Cluster Model

2011Ad15: Studied one-quasiparticle levels using the microscopic-macroscopic modified TCSM, QPM and the self-consistent SHFB approaches

2011Zh36: Systematics and calculated partial half-life of α decay to members of favored band. Accurate expressions are proposed for the evaluation of partial half-lives of these transitions based on microscopic quantum tunneling theory.

2002Du16: Calculated half-lives and Q(β^-)values of spontaneous nuclear decay processes in the framework of the effective liquid drop model (ELDM)

1997Mo25: Calculated ground-state binding energy, proton and neutron pairing gaps, neutron and proton separation energies, Q values and partial half-lives for α and β decays

1995Mo29: Calculated ground-state mass and deformations

1993Bu09: Calculated partial α decay half-life, α branching, and nuclear radius using the cluster model predictions

1981Mo24: Calculated electric multipole moments, Q2 and Q4 using macroscopic-microscopic model

1980Ho32: Calculated ground-state mass excess using macroscopic-microscopic model.Fission-barrier heights, deformation and energy at saddle-point were also calculated

1971Ga20: Calculated fission barriers, ground-state masses and particle separation energies

Systematic studies:

2013Af01: Systematic study of pairing and rotational properties of actinides using the covariant density functional theory (CDFT) and the density functional theory framework, respectively.

2012Zh01: Comparison of the low lying one-quasineutron band for n=151 isotones between the experimental values and calculated values using the cranked shell model (CSM) with pairing correlations

2011As03: Calculated ground-state deformation and energies of neutron one-quasiparticle states in the n=151 isotones using a macroscopic-microscopic model. Energy systematics discussed in terms of evolution of nuclear deformation

2007Ma82: Comparison with experimental results of ²⁴⁵Pu and systematics of neutron single-particle levels in n=151 isotones (²⁴⁷Cm, ²⁴⁹Cf, ²⁵¹Fm and ²⁵³No)

2006Sh19: Calculated energy levels of ground-state rotational band in n=151 isotones

2005Pa73: Calculated neutron one quasi-particle states of heaviest nuclei within a macroscopic-microscopic approach.

1977Ch27,1976Ch22: Extracted neutron single particle states with constant pairing elements

Q-value: ΔS(p)=18, ΔQ(α)=450 (syst, 2012Wa38)

E(level): From ²⁵¹Cf α decay, (d,p), (d,t) and ²⁴⁸Cm(²⁰⁹B,²¹⁰Biγ) data

J^π(level): From band assignments. Spin and parities for some of the bandheads are explained in comments for those levels. Arguments for band members are given with each band assignment. Nilsson state and band assignments were tentatively proposed to some levels above 600 keV by 1971Br27 from (d,p) and (d,t) data.

E(γ): From ²⁵¹Cf α decay and ²⁴⁸Cm(²⁰⁹B,²¹⁰Biγ) data

I(γ): Relative photon intensities de-exciting each level, adopted from ²⁵¹Cf α decay.

E(level) (keV)	J^π(level)	T_1/2(level)	E(γ) (keV)	Multipolarity	Mixing Ratio	Conversion Coefficient	Additional Data
61.67	11/2-		61.67 5	M1+E2	0.25 3	37.5	α=37.5 23, α(L)=27.8 16, α(M)=7.1 5, α(N)=1.96 13, α(O)=0.49 3, α(P)=0.092 5, α(Q)=0.00493 9
134.66	13/2-		73.00 8	[M1+E2]	0.7 3	39	α=39 13, α(L)=28 9, α(M)=8 3, α(N)=2.1 8, α(O)=0.52 18, α(P)=0.09 3, α(Q)=0.0023 5
134.66	13/2-		134.65 8	[E2]		4.94	α=4.94, α(K)=0.1531 22, α(L)=3.46 5, α(M)=0.976 14, α(N)=0.272 4, α(O)=0.0659 10, α(P)=0.01104 16, α(Q)=6.08×10^-5 9
219.02	15/2-		84.35 8	[M1+E2]		26	α=26 15, α(L)=19 11, α(M)=5 4, α(N)=1.5 9, α(O)=0.36 22, α(P)=0.06 4, α(Q)=0.0012 9
219.02	15/2-		157.35 8	[E2]		2.56	α=2.56, α(K)=0.1741 25, α(L)=1.723 25, α(M)=0.485 7, α(N)=0.1350 20, α(O)=0.0328 5, α(P)=0.00552 8, α(Q)=3.65×10^-5 6
227.38	5/2+	26.3 µs 3	165.70 5	E3		30.4	B(E3)(W.u.)=5.5 6, α=30.4, α(K)=0.235 4, α(L)=21.3 3, α(M)=6.47 10, α(N)=1.83 3, α(O)=0.445 7, α(P)=0.0750 11, α(Q)=0.000469 7
227.38	5/2+	26.3 µs 3	227.38 2	M2+E3	0.52 +9-8	10.3	B(E3)(W.u.)=7.3 21, B(M2)(W.u.)=0.0033 4, α=10.3 4, α(K)=6.0 5, α(L)=3.15 9, α(M)=0.87 3, α(N)=0.242 9, α(O)=0.0609 20, α(P)=0.0113 3, α(Q)=0.00056 4
265.86	(7/2+)		38.48 5	(M1+E2)	0.21 5	1.8×10²	α=1.8×10² 4, α(L)=1.4E2 3, α(M)=35 8, α(N)=9.8 21, α(O)=2.4 5, α(P)=0.44 8, α(Q)=0.0202 4
265.86	(7/2+)		265.86 8	[E1]		0.0565	α=0.0565, α(K)=0.0442 7, α(L)=0.00927 13, α(M)=0.00226 4, α(N)=0.000617 9, α(O)=0.0001540 22, α(P)=2.86×10^-5 4, α(Q)=1.559E-6 22
285.41	(7/2+)		58.03 5	(M1+E2)	0.53 11	80	α=80 16, α(L)=59 11, α(M)=16 4, α(N)=4.4 9, α(O)=1.08 21, α(P)=0.19 4, α(Q)=0.0052 4
285.41	(7/2+)		285.41 8	[E1]		0.0484	α=0.0484, α(K)=0.0380 6, α(L)=0.00787 11, α(M)=0.00192 3, α(N)=0.000523 8, α(O)=0.0001308 19, α(P)=2.44×10^-5 4, α(Q)=1.350E-6 19
318.31	9/2+		52.45 5	(M1+E2)	0.27 6	70	α=70 11, α(L)=51 8, α(M)=13.3 23, α(N)=3.7 7, α(O)=0.92 15, α(P)=0.169 24, α(Q)=0.00792 21
	9/2+		256.65 8	[E1]		0.0611	α=0.0611, α(K)=0.0477 7, α(L)=0.01007 15, α(M)=0.00246 4, α(N)=0.000670 10, α(O)=0.0001672 24, α(P)=3.10×10^-5 5, α(Q)=1.675E-6 24
	9/2+		318.3 1	[E1]		0.0384	α=0.0384, α(K)=0.0302 5, α(L)=0.00614 9, α(M)=0.001495 21, α(N)=0.000408 6, α(O)=0.0001021 15, α(P)=1.91×10^-5 3, α(Q)=1.086E-6 16
345.89	(9/2+)		60.5 1	(M1+E2)	0.48 16	62	α=62 18, α(L)=46 13, α(M)=12 4, α(N)=3.4 11, α(O)=0.83 25, α(P)=0.15 4, α(Q)=0.0047 5
	(9/2+)		284.2 1	[E1]		0.0489	α=0.0489, α(K)=0.0383 6, α(L)=0.00794 12, α(M)=0.00194 3, α(N)=0.000528 8, α(O)=0.0001320 19, α(P)=2.46×10^-5 4, α(Q)=1.362E-6 19
	(9/2+)		345.9 1	[E1]		0.0322	α=0.0322, α(K)=0.0254 4, α(L)=0.00510 8, α(M)=0.001240 18, α(N)=0.000338 5, α(O)=8.48×10^-5 12, α(P)=1.593E-5 23, α(Q)=9.22E-7 13
404.90	1/2+	100.6 ns 6	177.52 2	E2		1.567	B(E2)(W.u.)=0.1350 14, α=1.567, α(K)=0.1643 23, α(L)=1.015 15, α(M)=0.285 4, α(N)=0.0794 12, α(O)=0.0193 3, α(P)=0.00327 5, α(Q)=2.52E-5 4
516.68	(7/2+)		289.3 1	[M1+E2]		0.9	α=0.9 7, α(K)=0.7 6, α(L)=0.19 6, α(M)=0.049 13, α(N)=0.014 4, α(O)=0.0034 9, α(P)=0.00064 21, α(Q)=3.E-5 3
518.59	(3/2+)		113.7 1	[M1+E2]		8	α=8 3, α(L)=5.5 20, α(M)=1.5 7, α(N)=0.41 18, α(O)=0.10 4, α(P)=0.018 6, α(Q)=0.0005 4
518.59	(3/2+)		291.20 8	[M1+E2]		0.9	α=0.9 7, α(K)=0.7 6, α(L)=0.19 6, α(M)=0.048 13, α(N)=0.013 4, α(O)=0.0033 9, α(P)=0.00063 21, α(Q)=3.E-5 3
581.67	(5/2+)		315.8 1	[M1+E2]		0.7	α=0.7 6, α(K)=0.5 5, α(L)=0.15 6, α(M)=0.037 12, α(N)=0.010 3, α(O)=0.0026 8, α(P)=0.00049 18, α(Q)=2.6×10^-5 21
581.67	(5/2+)		354.3 1	[M1+E2]		0.5	α=0.5 4, α(K)=0.4 4, α(L)=0.10 5, α(M)=0.026 10, α(N)=0.0072 25, α(O)=0.0018 7, α(P)=0.00034 14, α(Q)=1.9×10^-5 16

Q(β-)=44 keV 7	S(n)= 5155 keV 4	S(p)= 6750 keV SY	Q(α)= 5354 keV 3
Reference: 2012WA38

References:
A	²⁵¹Cf α decay	B	²⁴⁷Am β^- decay
C	²⁴⁶Cm(d,p), ²⁴⁸Cm(d,t)	D	²⁴⁸Cm(²⁰⁹Bi,210BIG)

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-	1.56×10⁺⁷ y 5 % α = 100
61.67 4	A B C D	11/2-		61.67 5		M1+E2	0.0	9/2-
134.66 6	A C D	13/2-		73.00 8 134.65 8	35 8 100 13	[M1+E2] [E2]	61.67 0.0	11/2- 9/2-
219.02 7	A C D	15/2-		84.35 8 157.35 8	100 13 50 10	[M1+E2] [E2]	134.66 61.67	13/2- 11/2-
227.38 19	A B C	5/2+	26.3 µs 3	165.70 5 227.38 2	1.76 15 100 4	E3 M2+E3	61.67 0.0	11/2- 9/2-
265.86 4	A	(7/2+)		38.48 5 265.86 8	8.8 14 100 7	(M1+E2) [E1]	227.38 0.0	5/2+ 9/2-
285.41 5	A B C	(7/2+)		58.03 5 285.41 8	2.1 4 100 8	(M1+E2) [E1]	227.38 0.0	5/2+ 9/2-
309 3	C
314.7 9	D	17/2-		180 1			134.66	13/2-
318.31 5	A C	9/2+		52.45 5 256.65 8 318.3 1	37 4 100 8 38 4	(M1+E2) [E1] [E1]	265.86 61.67 0.0	(7/2+) 11/2- 9/2-
336 5	C
345.89 6	A C	(9/2+)		60.5 1 284.2 1 345.9 1	8.3 25 100 8 36 3	(M1+E2) [E1] [E1]	285.41 61.67 0.0	(7/2+) 11/2- 9/2-
370 5 ?	C
381 5	C	(11/2+)
398 4	C
404.90 3	A C	1/2+	100.6 ns 6	177.52 2		E2	227.38	5/2+
417 6 ?	C
421.0 9	D	19/2-		202 1			219.02	15/2-
433 2	A	(3/2+)
439 3	C
E(level) (keV)	XREF	J^π(level)	T_1/2(level)	E(γ) (keV)	I(γ)	M(γ)	Final Levels
448 2	A C	(5/2+)
506 3	C	(1/2+)
516.68 11	A C	(7/2+)		289.3 1		[M1+E2]	227.38	5/2+
518.59 7	A C	(3/2+)		113.7 1 291.20 8	8.0 17 100 10	[M1+E2] [M1+E2]	404.90 227.38	1/2+ 5/2+
539.8 12	D	21/2-		225 1			314.7	17/2-
550 2	C	(9/2+)
581.67 8	A C	(5/2+)		315.8 1 354.3 1	100 13 54 8	[M1+E2] [M1+E2]	265.86 227.38	(7/2+) 5/2+
592 2	C
604 3	C	(7/2+)
667.9 12	D	23/2-		247 1			421.0	19/2-
668 5	C	(3/2+)
687 5	C	(11/2+)
699 2	C	(9/2+)
749 5	C	(7/2+)
784 4	C	(3/2-)
803 5	C
807.9 12	D	25/2-		140 1 268 1			667.9 539.8	23/2- 21/2-
819 4	C	(7/2-)
819 4	C	(9/2+)
856 5	C
897 5	C	(11/2-)
947 2	C
957 2	C	(1/2-)
957.9 13	D	27/2-		150 290			807.9 667.9	25/2- 23/2-
988 5	C
1001 2	C	(3/2-,5/2-)
E(level) (keV)	XREF	J^π(level)	T_1/2(level)	E(γ) (keV)	I(γ)	M(γ)	Final Levels
1044 3	C
1064 3	C
1079 3	C	(5/2+)
1091 3	C
1118.9 14	D	29/2-		161 311			957.9 807.9	27/2- 25/2-
1159 3	C
1182 3	C	(9/2+)
1199 4 ?	C
1239 5	C
1247 5	C
1271 3	C
1283 3	C	(5/2-)
1287.9 15	D	31/2-		169 330			1118.9 957.9	29/2- 27/2-
1317 3	C
1356 3 ?	C
1364 4	C
1372 4	C
1467.9 16	D	33/2-		180? 349			1287.9 1118.9	31/2- 29/2-
1512 6	C
1655.9 16	D	35/2-		188 368			1467.9 1287.9	33/2- 31/2-
1853.9 17	D	37/2-		198 386			1655.9 1467.9	35/2- 33/2-
2056.9 19	D	39/2-		401			1655.9	35/2-
2271.9 20	D	41/2-		418			1853.9	37/2-
2487.9 22	D	43/2-		431			2056.9	39/2-
2717.9 22	D	45/2-		446			2271.9	41/2-
E(level) (keV)	XREF	J^π(level)	T_1/2(level)	E(γ) (keV)	I(γ)	M(γ)	Final Levels
2945.9 24	D	47/2-		458			2487.9	43/2-
3187.9 24	D	49/2-		470			2717.9	45/2-
3427 3	D	51/2-		481			2945.9	47/2-

E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 1 - 9/2[734] band.
0.0	9/2-	1.56×10⁺⁷ y 5 % α = 100
61.67 4	11/2-		61.67 5		M1+E2	0.0	9/2-
134.66 6	13/2-		73.00 8 134.65 8	35 8 100 13	[M1+E2] [E2]	61.67 0.0	11/2- 9/2-
219.02 7	15/2-		84.35 8 157.35 8	100 13 50 10	[M1+E2] [E2]	134.66 61.67	13/2- 11/2-
314.7 9	17/2-		180 1			134.66	13/2-
421.0 9	19/2-		202 1			219.02	15/2-
539.8 12	21/2-		225 1			314.7	17/2-
667.9 12	23/2-
807.9 12	25/2-		140 1 268 1			667.9 539.8	23/2- 21/2-
957.9 13	27/2-		150 290			807.9 667.9	25/2- 23/2-
1118.9 14	29/2-
1287.9 15	31/2-		169 330			1118.9 957.9	29/2- 27/2-
1467.9 16	33/2-
1655.9 16	35/2-
1853.9 17	37/2-
2056.9 19	39/2-		401			1655.9	35/2-
2271.9 20	41/2-
2487.9 22	43/2-		431			2056.9	39/2-
2717.9 22	45/2-
2945.9 24	47/2-
3187.9 24	49/2-
3427 3	51/2-
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 2 - 5/2[622] band.
227.38 19	5/2+	26.3 µs 3
265.86 4	(7/2+)		38.48 5 265.86 8	8.8 14 100 7	(M1+E2) [E1]	227.38 0.0	5/2+ 9/2-
318.31 5	9/2+		52.45 5 256.65 8 318.3 1	37 4 100 8 38 4	(M1+E2) [E1] [E1]	265.86 61.67 0.0	(7/2+) 11/2- 9/2-
381 5	(11/2+)
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 3 - 7/2[624] band.
285.41 5	(7/2+)
345.89 6	(9/2+)		60.5 1 284.2 1 345.9 1	8.3 25 100 8 36 3	(M1+E2) [E1] [E1]	285.41 61.67 0.0	(7/2+) 11/2- 9/2-
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 4 - 1/2[620] band.
404.90 3	1/2+	100.6 ns 6
433 2	(3/2+)
448 2	(5/2+)
516.68 11	(7/2+)		289.3 1		[M1+E2]	227.38	5/2+
550 2	(9/2+)
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 5 - 1/2[631] band.
506 3	(1/2+)
518.59 7	(3/2+)		113.7 1 291.20 8	8.0 17 100 10	[M1+E2] [M1+E2]	404.90 227.38	1/2+ 5/2+
581.67 8	(5/2+)		315.8 1 354.3 1	100 13 54 8	[M1+E2] [M1+E2]	265.86 227.38	(7/2+) 5/2+
604 3	(7/2+)
699 2	(9/2+)
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 6 - 1/2[501] band.
957 2	(1/2-)
1001 2	(3/2-,5/2-)

E(level)	J^π(level)	T_1/2(level)	Comments
0.0	9/2-	1.56×10⁺⁷ y 5 % α = 100	μ=0.36 7 (1973Ab03,2011StZZ) E(level): 9/2[734] band.
61.67	11/2-		XREF: B(?). E(level): 9/2[734] band.
134.66	13/2-		E(level): 9/2[734] band.
219.02	15/2-		E(level): 9/2[734] band.
227.38	5/2+	26.3 µs 3	E(level): 5/2[622] band.
265.86	(7/2+)		E(level): 5/2[622] band.
285.41	(7/2+)		E(level): 7/2[624] band.
314.7	17/2-		E(level): 9/2[734] band.
318.31	9/2+		E(level): 5/2[622] band.
345.89	(9/2+)		E(level): 7/2[624] band.
381	(11/2+)		E(level): 5/2[622] band.
404.90	1/2+	100.6 ns 6	E(level): 1/2[620] band.
421.0	19/2-		E(level): 9/2[734] band.
433	(3/2+)		E(level): 1/2[620] band.
448	(5/2+)		E(level): 1/2[620] band.
506	(1/2+)		E(level): 1/2[631] band.
516.68	(7/2+)		E(level): 1/2[620] band.
518.59	(3/2+)		E(level): 1/2[631] band.
539.8	21/2-		E(level): 9/2[734] band.
550	(9/2+)		E(level): 1/2[620] band.
581.67	(5/2+)		E(level): 1/2[631] band.
604	(7/2+)		E(level): 1/2[631] band.
667.9	23/2-		E(level): 9/2[734] band.
699	(9/2+)		Level was assumed doublet in the (d,p),(d,t) reactions, and the other member was assigned to the 5/2⁺,3/2[622] state by 1971Br27. E(level): Level was assumed doublet in the (d,p),(d,t) reactions, and the other member was assigned to the 5/2⁺,3/2[622] state by 1971Br27. 1/2[631] band.
807.9	25/2-		E(level): 9/2[734] band.
E(level)	J^π(level)	T_1/2(level)	Comments
957	(1/2-)		E(level): 1/2[501] band.
957.9	27/2-		E(level): 9/2[734] band.
1001	(3/2-,5/2-)		E(level): 1/2[501] band.
1118.9	29/2-		E(level): 9/2[734] band.
1287.9	31/2-		E(level): 9/2[734] band.
1467.9	33/2-		E(level): 9/2[734] band.
1655.9	35/2-		E(level): 9/2[734] band.
1853.9	37/2-		E(level): 9/2[734] band.
2056.9	39/2-		E(level): 9/2[734] band.
2271.9	41/2-		E(level): 9/2[734] band.
2487.9	43/2-		E(level): 9/2[734] band.
2717.9	45/2-		E(level): 9/2[734] band.
2945.9	47/2-		E(level): 9/2[734] band.
3187.9	49/2-		E(level): 9/2[734] band.
3427	51/2-		E(level): 9/2[734] band.