ADOPTED LEVELS, GAMMAS for 216At
Author: S. -c. Wu | Citation: Nucl. Data Sheets 108, 1057 (2007) | Cutoff date: 1-Mar-2007
Full ENSDF file | Adopted Levels (PDF version)
Q(β-)=2004 keV 7 | S(n)= 4559 keV 8 | S(p)= 4491 keV 4 | Q(α)= 7950 keV 3 | ||
Reference: 2012WA38 |
References: | |||
A | 220Fr α decay |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
0.0 | A | 1- | 0.30 ms 3 % α = 100 % ε < 3×10-7 % β- < 6×10-3 | |||||
44.59 4 | A | (2)- | 44.60 5 | | M1 | 0.0 | 1- | |
57.11 15 | A | (4)- | ||||||
105.89 5 | A | (0)- | 61.3 1 105.88 5 | 23 3 100 7 | E2 M1 | 44.59 0.0 | (2)- 1- | |
122.0 2 | A | (5)- | 64.9 1 | | M1 | 57.11 | (4)- | |
153.4 1 | A | (2)- | 96.4? 108.8 1 153.4 1 | <15 17.3 23 100 8 | (E2) M1 M1 | 57.11 44.59 0.0 | (4)- (2)- 1- | |
160.73 5 | A | (1)- | 54.8 1 116.2 1 160.7 1 | 3.9 13 9.2 13 100 5 | M1 M1 | 105.89 44.59 0.0 | (0)- (2)- 1- | |
169.3 1 | A | (3-) | 112.1 2 124.7 1 | 7 3 100 9 | 57.11 44.59 | (4)- (2)- | ||
199.2 2 | A | (3)- | 45.8S 142.1 1 154.5 3 | 100 13 50 13 | M1 M1 | 153.4 57.11 44.59 | (2)- (4)- (2)- | |
208.0 1 | A | (1,2)- | 47.3S 163.4 1 208.0 4 | 100 3 3.9 17 | M1 | 160.73 44.59 0.0 | (1)- (2)- 1- | |
234.6 2 | A | (1,2-) | 128.7 2 | | 105.89 | (0)- | ||
254.8 4 | A | 132.8 3 | | 122.0 | (5)- | |||
278.2 2 | A | (4)- | 156.1 1 221.1 3 233.6 2 | 100 18 18 5 32 6 | M1 | 122.0 57.11 44.59 | (5)- (4)- (2)- | |
302.8 2 | A | (1,2-) | 196.9 2 258.2 2 302.7 4 | 42 11 100 21 63 11 | 105.89 44.59 0.0 | (0)- (2)- 1- | ||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
317 3 | A | |||||||
381.1 2 | A | (2-,3-) | 173.0 3 182.1 2 323.9 7 381.0 5 | 19 10 16 6 32 10 100 16 | 208.0 199.2 57.11 0.0 | (1,2)- (3)- (4)- 1- | ||
413? | (9-) | 0.1 ms SY % α = 100 | ||||||
421.5 4 | A | 260.5 5 268.3 4 | 78 33 100 33 | 160.73 153.4 | (1)- (2)- | |||
479.3 | A | 318.6 4 | | 160.73 | (1)- |
E(level): From least squares fit to Eγ
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 1 - Possible Configuration=((p,H9/2,+3)(n,G9/2,+5)) (1996Sh05) | |||||||
0.0 | 1- | 0.30 ms 3 % α = 100 % ε < 3×10-7 % β- < 6×10-3 | |||||
44.59 4 | (2)- | 44.60 5 | | M1 | 0.0 | 1- | |
57.11 15 | (4)- | ||||||
105.89 5 | (0)- | 61.3 1 105.88 5 | 23 3 100 7 | E2 M1 | 44.59 0.0 | (2)- 1- | |
122.0 2 | (5)- | 64.9 1 | | M1 | 57.11 | (4)- | |
169.3 1 | (3-) | 112.1 2 124.7 1 | 7 3 100 9 | 57.11 44.59 | (4)- (2)- | ||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 2 - Possible Configuration=((p,H9/2,+3)(n,G9/2,+4)(n,I11/2)) + | |||||||
153.4 1 | (2)- | ||||||
160.73 5 | (1)- | 54.8 1 116.2 1 160.7 1 | 3.9 13 9.2 13 100 5 | M1 M1 | 105.89 44.59 0.0 | (0)- (2)- 1- | |
199.2 2 | (3)- | ||||||
278.2 2 | (4)- | 156.1 1 221.1 3 233.6 2 | 100 18 18 5 32 6 | M1 | 122.0 57.11 44.59 | (5)- (4)- (2)- |
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
44.59 | (2)- | 44.60 5 | M1 | 24.6 | α=24.6 | |
105.89 | (0)- | 61.3 1 | E2 | 76.3 | α=76.3 | |
(0)- | 105.88 5 | M1 | 10.27 | α=10.27 | ||
122.0 | (5)- | 64.9 1 | M1 | 8.18 | α=8.18 | |
153.4 | (2)- | 96.4 | (E2) | 9.00 | α=9.00 | |
(2)- | 108.8 1 | M1 | 9.51 | α=9.51 | ||
(2)- | 153.4 1 | M1 | 3.58 | α=3.58 | ||
160.73 | (1)- | 116.2 1 | M1 | 7.88 | α=7.88 | |
(1)- | 160.7 1 | M1 | 3.14 | α=3.14 | ||
199.2 | (3)- | 142.1 1 | M1 | 4.45 | α=4.45 | |
(3)- | 154.5 3 | M1 | 3.51 | α=3.51 | ||
208.0 | (1,2)- | 163.4 1 | M1 | 2.99 | α=2.99 | |
278.2 | (4)- | 156.1 1 | M1 | 3.41 | α=3.41 |
Additional Level Data and Comments:
E(level) | Jπ(level) | T1/2(level) | Comments |
0.0 | 1- | 0.30 ms 3 % α = 100 % ε < 3×10-7 % β- < 6×10-3 | E(level): Possible Configuration=((p,H9/2,+3)(n,G9/2,+5)) (1996Sh05). |
44.59 | (2)- | E(level): Possible Configuration=((p,H9/2,+3)(n,G9/2,+5)) (1996Sh05). | |
57.11 | (4)- | E(level): Possible Configuration=((p,H9/2,+3)(n,G9/2,+5)) (1996Sh05). | |
105.89 | (0)- | E(level): Possible Configuration=((p,H9/2,+3)(n,G9/2,+5)) (1996Sh05). | |
122.0 | (5)- | E(level): Possible Configuration=((p,H9/2,+3)(n,G9/2,+5)) (1996Sh05). | |
153.4 | (2)- | E(level): Possible Configuration=((p,H9/2,+3)(n,G9/2,+4)(n,I11/2)) +. | |
160.73 | (1)- | E(level): Possible Configuration=((p,H9/2,+3)(n,G9/2,+4)(n,I11/2)) +. | |
169.3 | (3-) | E(level): Possible Configuration=((p,H9/2,+3)(n,G9/2,+5)) (1996Sh05). | |
199.2 | (3)- | E(level): Possible Configuration=((p,H9/2,+3)(n,G9/2,+4)(n,I11/2)) +. | |
278.2 | (4)- | E(level): Possible Configuration=((p,H9/2,+3)(n,G9/2,+4)(n,I11/2)) +. | |
413 | (9-) | 0.1 ms SY % α = 100 | 1971Br13 report a 7960α with T1/2 characteristic of 220Fr in a 224Ac source (absence of this group in αα with 212Po rules out assignment to 220Fr itself). Iα/Iα(216At g.s. α)=2.8×10-4. This α group may feed the 250-keV, (9-) isomer in 212Bi, in which case one predicts, on the basis of systematics (HF=2.2), a 9- isomer in 216At at 413 keV with T1/2≈0.1 ms (1980Sc26). |
Calculations:
n-p interaction energy: 1990Mo11
Spontaneous emission of heavy ions: 1986Po06
Levels: All information about excited levels in this nucleus (except the 413-keV level) comes from 220Fr α decay
Gammas: All γ data are from 220Fr α decay
Q-value: Note: Current evaluation has used the following Q record 2002 8 4559 8 4491 4 7950 3 2003Au03