Decays of 131 In , 131 Sn , and the position of the h11/2 neutron hole state
Abstract
The decays of the three isomers of 131 In and the total decay energies of the two isomers of 131 Sn have been studied in high sensitivity experiments at the OSIRIS mass separator. The main purpose of the investigation was to determine the position of the neutron hole h11/2 state, since a previous determination appeared to be in error. The present results support a small separation of the d3/2 and h11/2 neutron hole states. The new value obtained from measurements of decay energies is 69±14 keV . A more precise value of 65.1 keV may be deduced from the level scheme of 131 Sn obtained currently, however without firm support from coincidence data. This relatively low excitation energy of the h11/2 state is in agreement with systematics and in disagreement with the previous determination. A re-evaluation of the Qβ values and isomer spacings of 131 In has been made.
- Publication:
-
Physical Review C
- Pub Date:
- September 2004
- DOI:
- 10.1103/PhysRevC.70.034312
- Bibcode:
- 2004PhRvC..70c4312F
- Keywords:
-
- 21.10.-k;
- 23.20.Lv;
- 21.60.Cs;
- 27.60.+j;
- Properties of nuclei;
- nuclear energy levels;
- gamma transitions and level energies;
- Shell model;
- 90<
- =A<
- =149