Ga(n,γ) E

[Pages:8]7301Ga39-1

From ENSDF - Evaluated July 2016

7301Ga39-1

69Ga(n,) E=thermal 1970Li04,1971Ve03

Type Full Evaluation

Author

History Citation

G. Gu?rdal, E. A. Mccutchan NDS 136, 1 (2016)

Literature Cutoff Date 1-Jul-2016

Target: J=3/2-. 1971Ar12: Measured E with Ge(Li) detector. 1971Ve03: Measured E, I with a Ge(Li)-NaI(Tl) pair spectrometer. 1970Li04: Measured E, I with a Ge(Li)-NaI(Tl) pair spectrometer. 1972St06: polarized neutrons. Measured polarization function R proportional to the circular polarization of primary capture -rays. The 69Ga(n,) level scheme is mainly that proposed by 1970Li04 and 1971Ve03. Many placements are not adopted by the

evaluators as 1) they are inconsistent with the results of both (p,n) and (,pn) studies and 2) 1970Li04 base some placements on a tentative 188-keV level which subsequent studies found no evidence for. Additional primary and secondary rays have been placed by the evaluators on the basis of 70Ga levels known to exist from other reactions.

70Ga Levels

E(level)

0.0 508.94 24 651.02 18 691.16 20 878.7 3 995.1 6 1009.6 4 1014.6 20 1024.9 3 1140.0 4 1200.4 3 1252.6 20 1263.4 6 1307.5 6 1312.3 14 1359.2 7 1414.3 9 1448.9 5 1457.1 8 1518.6 8 1533.3 4 1555.2 8 1622.7 10 1633.7 10 1691.7 9 1720.8? 9 1726.3 9 1735.7 10 1794.3? 9 1824.1 9 1846.7 20 1866.2? 17 1906.8 17 1930.5 17 1937.7 20 1970.7 10 1984.7 10 2016.7 20 2026.7 20

J 1+ 2+ 1+ ,2+ 2- 4- 2+ 1+ ,2+ ,3+ 1+ ,2+ ,3+ 2+ ,3+ 1,2 2+ 3- ,4-

1+ ,2+ 2+

1+ ,2+ 1+ ,2+ 1+ ,2+ 2+ 2+ 1- ,2- 1,2,3

1+ ,2+ ,3+

1+ ,2+ ,3+

+ + + +

-

Continued on next page (footnotes at end of table) 1

7301Ga39-2

From ENSDF

7301Ga39-2

69Ga(n,) E=thermal 1970Li04,1971Ve03 (continued)

70Ga Levels (continued)

E(level)

2074.7 10 2115.4 17 2127 3 2142.8 17 2164.5 10 2189.7 20 2213.7 20 2233.7 20 2254.7 20 2319.7 10 2351.7 10 2388.7 10 2409.8 10 2430.7 10 2464.7 10 2477.7 10 2520.7 10 2548.7 20 2571.7 10 2624.7 20 2654.7 10 2698.1 17

(7653.9 3)

J

-

- -

1-,2-#

E(level): 2012Wa38 gives 7653.65 17.

Comments

From a least-squares fit to E, by evaluators. From the Adopted Levels. # s-wave neutron capture on J=3/2- target.

(70Ga)

E

154 2 187.5# 2

318.4# 4

362c 2 374.1# 4 393 2 x410 2 427 2 508.4b# 3 508.4b# 3 515.7# 4 553 2 561 2 x574& 2 x596& 2

Ia

4.8 31

18

2.2 6.6 13 3.2 2.9 ................
................

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