Possible antimagnetic rotational band and neutron alignment in In113

The $$\varDelta I=2$$ bands in $$^{109}\hbox {In}$$: possible antimagnetic rotation

“…According to the configuration assignment, bands 7 and 8 are believed to be related to 1p1h proton excitations from the g 9/2 orbital to one of the g 7/2 and d 5/2 orbitals above the shell gap. Similar bands related to the g 7/2 orbital in 107,111,113 In [33,34,28] are summarized in Fig 4 . Even though several corresponding levels in 107 In have not been observed, the isotopic regularity of the level energies is significant. It is worth noting that the excitation energies of 1p1h proton excitation from g 9/2 to g 7/2 orbital in 109,111,113 In are within 1∼2 MeV relative to the ground state, and decreases with the increasing neutron number.…”

“…Moreover, when the additional proton of indium nuclei is occupying the g 7/2 or d 5/2 orbital, the rotational bands after the h 11/2 neutrons alignment at high frequencies are perfect candidates for the two-shears-like mechanism, such as the rotational bands in 108,110,112,113 In [25,26,27,28]. The dynamic moment of inertia J (2) is a sensitive probe of the nuclear collectivity.…”

“…Moreover, without any additional parameters, the rotation excitations can be described self-consistently with the tilted axis cranking relativistic mean-field (TAC-RMF) approach [17,18]. In particular, the TAC-RMF model has been successfully used in describing magnetic rotation (MR) and AMR microscopically and self consistently in different mass regions [17,18], and especially the 110 region, such as the AMR bands in 105,109,110 Cd [43,44,45,46,47] and 108,110,112,113 In [26,27,28], and also the MR bands in 113,114 In [13,48]. In the present TAC-RMF calculations, the point-coupling interaction PC-PK1 [49] is used for the Lagrangian without any additional parameters.…”

“…For In isotopes, when an additional proton occupies the g 7/2 or d 5/2 orbital, the "two-shears-like mechanism" can also be expected. In fact, the rotational bands in 108,110 In [25,26], 112 In [27] and 113 In [28] have been taken as candidates for antimagnetic rotation.…”

Possible antimagnetic rotational band in 127Xe

“…A semiclassical description of magnetic rotation (MR) was given by Macchiavelli and Clark [5][6][7] and subsequently was extended for antimagnetic rotation (AMR) by Sugawara et al [8]. Interestingly, in contrast to the rich abundance of MR bands over a long range of mass number (A≈60-200 [2]), the observation of AMR bands was limited to the A≈110 mass region, mainly in [108][109][110][111][112][113] In [9][10][11][12], [105][106][107][108][109][110][111] Cd [13][14][15][16][17][18][19][20], [100][101][102][103][104] Pd [21][22][23][24][25] and 102 Ru [26] nuclei. Recently, AMR band has also been observed in 142,143 Eu [27,28], 144 Dy [8] and 58 Fe [29], outside of the A≈110 region.…”