Lifetime Measurement of the 21+ State in C20
Abstract
Establishing how and when large N/Z values require modified or new theoretical tools is a major quest in nuclear physics. Here we report the first measurement of the lifetime of the 21+ state in the near-dripline nucleus C20. The deduced value of τ21+=9.8±2.8(stat)-1.1+0.5(syst)ps gives a reduced transition probability of B(E2;21+→0g.s.+)=7.5-1.7+3.0(stat)-0.4+1.0(syst)e2fm4 in good agreement with a shell model calculation using isospin-dependent effective charges.
- Publication:
-
Physical Review Letters
- Pub Date:
- September 2011
- DOI:
- 10.1103/PhysRevLett.107.102501
- Bibcode:
- 2011PhRvL.107j2501P
- Keywords:
-
- 27.30.+t;
- 21.10.Tg;
- 23.20.Lv;
- 20<
- =A<
- =38;
- Lifetimes;
- gamma transitions and level energies