Magnetic shift of magic nuclei

魔法核の磁気転位

Kondratyev, V. N.

Kondratyev, V. N.

中性子星における磁場強度で原子核の構造が変化し、結合エネルギーの殻補正エネルギーに顕著な影響が見られることが判明した。これは、主として核子のスピンと磁場の結合によるパウリ型のスピン磁性効果で、そのために殻補正エネルギーの位相変化として解釈でき、その結果、鉄領域原子核の魔法数が小さな値に変化する可能性が示唆された。

As we have recently proposed study magnetic fields can modify dramatically the nuclear structure leading, e.g., to a change of shell-correction components of binding energies and nuclear magic numbers. In this contribution we further demonstrate that the predominant mechanism of such a modification can be interpreted as a phase-shift in shell-oscillations originating from a field dependent interference of contributions coming from majority- and minority-spin energy levels. Nuclear magic numbers corresponding to the vicinity of the stability line depend on the magnetic field and are changed considerably at the strength scale G relevant, e.g., for supernovas and neutron stars. At such a field strength the magic nuclei of the iron region are shifted towards smaller mass numbers.