List of levels for 220FR

Authors: E. Browne, J. K. Tuli | Citation: Nucl. Data Sheets 112, 1115 (2011) | Cutoff date: 31-Oct-2010

Calculations, compilations:

g.s. Jπ with octupole deformation: 1988Sh01

Level structure, odd-odd actinides: 1994So16

n-p interaction energy: 1990Mo11

Spontaneous emission of heavy ions: 1986Po06

Levels: The level scheme and all information on excited levels come from ²²⁴Ac α decay.

Gammas: All γ-ray data are from ²²⁴Ac α decay

Q-value: Note: Current evaluation has used the following Q record 1210 10 5207 8 4637 5 6800.7 19 2009AuZZ,2003Au03

E(level): From least squares fit to Eγ, unless otherwise noted

J^π(level): Levels without spin assignments are all deduced from α decay; therefore, all have Jπ=0-,1⁺,2-,3⁺,4- etc.

E(level) (keV)	J^π(level)	T_1/2(level)	E(γ) (keV)	Multipolarity	Conversion Coefficient	Additional Data
48.38	2+		48.40 5	M1	24.7	α=24.7 1
72.99	(3)+		60.67 5	M1	12.8	α=12.8
72.99	(3)+		72.9 1	(E2)	39.8	α=39.8 3
127.31	(4+)		54.3 1	(M1)	17.7	α=17.7 1
140.72	1-		128.4 3	E1	0.261	α=0.261 2
140.72	1-		140.7 1	E1	0.209	α=0.209
156.82	2-		83.9 2	E1	0.173	α=0.173 1
	2-		108.43 5	E1	0.395	α=0.395
	2-		144.44 5	E1	0.196	α=0.196
	2-		149.90 5	E1	0.179	α=0.179
	2-		156.82 5	E1	0.161	α=0.161
177.18	(3)-		164.8 1	E1	0.142	α=0.142
214.43	(4)-		194.5 3	E1	0.095	α=0.095
214.43	(4)-		207.6 2	E1	0.0813	α=0.0813
273.64	1+		225.3 2	M1	1.51	α=1.51
	1+		261.3 2	M1	1.00	α=1.00
	1+		273.7 4	M1	0.882	α=0.882
299.91	(1)+		251.6 3	M1	1.11	α=1.11
299.91	(1)+		300.0 3	(M1)	0.686	α=0.686
340.25	(0)-		40.4 3	(E1)	1.23	α=1.23 2
	(0)-		66.6 1	E1	0.321	α=0.321 3
	(0)-		199.5 2	M1	2.13	α=2.13
355.13	(0-,2-)		55.3 2	(E1)	0.529	α=0.529 5
355.13	(0-,2-)		81.5 3	(E1)	0.187	α=0.187 3

Q(β-)=1213 keV 9	S(n)= 5207 keV 8	S(p)= 4637 keV 5	Q(α)= 6800.7 keV 19
Reference: 2012WA38

E(level) (keV)	J^π(level)	T_1/2(level)	E(γ) (keV)	I(γ)	M(γ)	Final Levels
0	1+	27.4 s 3 % β^- = 0.35 5 % α = 99.65 5
6.92 6	(3)+		6.9S			0	1+
12.37 5	2+		12.4S			0	1+
19.89 10	(4)+		13.0S			6.92	(3)+
48.38 4	2+		35.9 1 41.5 1 48.40 5	5 3 6 2 100 8	M1	12.37 6.92 0	2+ (3)+ 1+
55.83 13	(5+)		35.9 1	100		19.89	(4)+
72.99 6	(3)+		24.6 53.1 1 60.67 5 66.0 1 72.9 1	≈22 22 4 100 4 50 9 11 4	M1 (E2)	48.38 19.89 12.37 6.92 0	2+ (4)+ 2+ (3)+ 1+
127.31 11	(4+)		54.3 1		(M1)	72.99	(3)+
140.72 6	1-		92.34 5 128.4 3 140.7 1	14.6 14 23 6 100 8	E1 E1	48.38 12.37 0	2+ 2+ 1+
156.82 4	2-		16.1S 83.9 2 108.43 5 144.44 5 149.90 5 156.82 5	22.0 12 13.0 12 27.8 25 15.4 25 100 6	E1 E1 E1 E1 E1	140.72 72.99 48.38 12.37 6.92 0	1- (3)+ 2+ 2+ (3)+ 1+
177.18 8	(3)-		20.4S 49.8 2 104.4 2 128.9 3 164.8 1	8 2 26 6 72 20 100 20	E1	156.82 127.31 72.99 48.38 12.37	2- (4+) (3)+ 2+ 2+
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ) (keV)	I(γ)	M(γ)	Final Levels
200.21 15	(5+)		72.9 1	100		127.31	(4+)
214.43 9	(4)-		37.3 1 141.4 1 158.5 2 194.5 3 207.6 2	5.7 10 100 19 15 4 6.6 19 34 9	E1 E1	177.18 72.99 55.83 19.89 6.92	(3)- (3)+ (5+) (4)+ (3)+
246.8 10
257.0 15
273.64 11	1+		225.3 2 261.3 2 273.7 4	17 5 100 8 5.8 16	M1 M1 M1	48.38 12.37 0	2+ 2+ 1+
276.02 20			263.1 5 ?			12.37	2+
290.8 3	(5-)		163.3 5 271.5 4	≈50 100 30		127.31 19.89	(4+) (4)+
299.91 15	(1)+		251.6 3 287.6 5 300.0 3	100 27 27 12 65 15	M1 (M1)	48.38 12.37 0	2+ 2+ 1+
306.9 15
314.8 4			114.7 5 258.8 5	100 60 ≈100		200.21 55.83	(5+) (5+)
340.25 12	(0)-		40.4 3 66.6 1 199.5 2 340.3 3	8 3 100 8 50 17 8 3	(E1) E1 M1	299.91 273.64 140.72 0	(1)+ 1+ 1- 1+
347.9 4			328.0 3	100		19.89	(4)+
355.13 19	(0-,2-)		55.3 2 79.10 5 81.5 3 228?	14 4 100 11 75 7	(E1) (E1)	299.91 276.02 273.64 127.31	(1)+ 1+ (4+)
361.0 4			87.4 3			273.64	1+
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ) (keV)	I(γ)	M(γ)	Final Levels
364.16 23	3+,4-		73.6 3 186.8 3 357.0 5	100 50 100 33 ≈50		290.8 177.18 6.92	(5-) (3)- (3)+
376.49 20	(2-)		103.1 4 328.0 3 364.1 3	≈19 33 14 100 14		273.64 48.38 12.37	1+ 2+ 2+
380.1 10
414.6 20
442.2 15
452.4 11			97.3?			355.13	(0-,2-)
479.6 20
501.1 4			48.6? 201.1 4 227.7 5	100 50 100 33		452.4 299.91 273.64	(1)+ 1+
511.1 10			491.2			19.89	(4)+
579.9 20

E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 1 - K^π=1⁺ GS ROTATIONAL band
0	1+	27.4 s 3 % β^- = 0.35 5 % α = 99.65 5
48.38 4	2+		35.9 1 41.5 1 48.40 5	5 3 6 2 100 8	M1	12.37 6.92 0	2+ (3)+ 1+
72.99 6	(3)+		24.6 53.1 1 60.67 5 66.0 1 72.9 1	≈22 22 4 100 4 50 9 11 4	M1 (E2)	48.38 19.89 12.37 6.92 0	2+ (4)+ 2+ (3)+ 1+
127.31 11	(4+)		54.3 1		(M1)	72.99	(3)+
200.21 15	(5+)		72.9 1	100		127.31	(4+)
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 2 - K^π=1- band
140.72 6	1-
156.82 4	2-		16.1S 83.9 2 108.43 5 144.44 5 149.90 5 156.82 5	22.0 12 13.0 12 27.8 25 15.4 25 100 6	E1 E1 E1 E1 E1	140.72 72.99 48.38 12.37 6.92 0	1- (3)+ 2+ 2+ (3)+ 1+
177.18 8	(3)-		20.4S 49.8 2 104.4 2 128.9 3 164.8 1	8 2 26 6 72 20 100 20	E1	156.82 127.31 72.99 48.38 12.37	2- (4+) (3)+ 2+ 2+
214.43 9	(4)-		37.3 1 141.4 1 158.5 2 194.5 3 207.6 2	5.7 10 100 19 15 4 6.6 19 34 9	E1 E1	177.18 72.99 55.83 19.89 6.92	(3)- (3)+ (5+) (4)+ (3)+
290.8 3	(5-)		163.3 5 271.5 4	≈50 100 30		127.31 19.89	(4+) (4)+
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 3 - possible K^π=2⁺ band
6.92 6	(3)+
12.37 5	2+		12.4S			0	1+
19.89 10	(4)+		13.0S			6.92	(3)+
55.83 13	(5+)		35.9 1	100		19.89	(4)+
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 4 - possible K^π=0- band
340.25 12	(0)-
376.49 20	(2-)		103.1 4 328.0 3 364.1 3	≈19 33 14 100 14		273.64 48.38 12.37	1+ 2+ 2+

E(level)	J^π(level)	T_1/2(level)	Comments
0	1+	27.4 s 3 % β^- = 0.35 5 % α = 99.65 5	Q=+0.47 3 (1985Co24,2005St24), μ=-0.67 1 (1985Co24,2005St24) Q: from 1987Co19, revised measurement of 1985Co24, based on the ratio of hyperfine constants relative to ²¹²Fr. E(level): Q: from 1987Co19, revised measurement of 1985Co24, based on the ratio of hyperfine constants relative to ²¹²Fr. K^π=1⁺ GS ROTATIONAL band.
6.92	(3)+		E(level): possible K^π=2⁺ band.
12.37	2+		E(level): possible K^π=2⁺ band.
19.89	(4)+		E(level): possible K^π=2⁺ band.
48.38	2+		E(level): K^π=1⁺ GS ROTATIONAL band.
55.83	(5+)		E(level): possible K^π=2⁺ band.
72.99	(3)+		E(level): K^π=1⁺ GS ROTATIONAL band.
127.31	(4+)		E(level): K^π=1⁺ GS ROTATIONAL band.
140.72	1-		E(level): K^π=1- band.
156.82	2-		E(level): K^π=1- band.
177.18	(3)-		E(level): K^π=1- band.
200.21	(5+)		E(level): K^π=1⁺ GS ROTATIONAL band.
214.43	(4)-		E(level): K^π=1- band.
246.8			E(level): From Eα.
257.0			E(level): From Eα.
290.8	(5-)		E(level): K^π=1- band.
306.9			E(level): From Eα.
340.25	(0)-		E(level): possible K^π=0- band.
376.49	(2-)		E(level): possible K^π=0- band.
380.1			E(level): From Eα.
414.6			E(level): From Eα.
442.2			E(level): From Eα.
479.6			E(level): From Eα.
579.9			E(level): From Eα.