Nuclear structure of proton-rich unstable nucleus 28P has been studied by measuring its g-factor for the first time. The g-factor of 28P (Iπ =3+, T1/2=270.3 ms) was measured by means of β-NMR technique combined with the new polarization technique for charge exchange reaction product in the intermediate energy heavy ion collisions. The obtained g-factor of g=0.1028(27) is very much quenched from the Schmidt value, but is well reproduced by the shell model (+0.102). In connection with the magnetic moment of the mirror partner and the β-ray transition probability, the orbital angular momenta and intrinsic spins of protons and neutrons have been determined as lp =0.43(29), ln =1.85(29), Sp)=0.28(4), and Sn =0.44(4).
郑永男周冬梅K. MatsutaM. MiharaM. FukudaD. NishimuraJ. KomurasakiD. IshikawaR. MatsumiyaT. NagatomoT. IzumikawaS. TakahashiH. HiranoT. OhtsuboS. MomotaY. NojiriA. KitagawaM. KanazawaM. TorikoshiS. SatoT. MinamisonoJ. R. AlonsoG. F. KrebsT. J. M. Symons袁大庆左翼范平T. Suzuki张锡珍朱升云
The extoic structure of 29P was investigated by measuring its magnetic moment in the ground state with β-NMR method. We got the experimental value of 1.2346 μN after diamagnetism correction. It is very close to the calculated value of 1.1009 μN computed with shell model. The shell model calculation also gave a proton density distribution of 29P with a long tail. The present results show that 2s1/2 proton in the 29P may lead to the proton-skin structure.
