In-beam γ-ray spectroscopy of 42Ca

Superdeformed and Triaxial States inCa42

“…Firstly, its moment of inertia, which is proportional to the quadrupole deformation parameter β 2 [25], is large and similar to those in the SD bands in 36 Ar and 40 Ca. The strongly deformed character of this band is further supported by the observation of its preferential feeding from the low-energy component of the highly-split giant dipole resonance decay of 46 Ti [26].…”

Coexistence of various deformed states and ± clustering in 42Ca

“…This rotational band has a large moment of inertia that is similar to the ones of the SD bands in 36 Ar and 40 Ca, scaled by A 5/3 [9], which is proportional to square of quadrupole deformation parameter β in the liquid-drop model. In contrast to the small level spacings, the in-band E2 transition strengths are rather weak and are of the same order as those of the ND band in 40 Ca.…”

“…In the mass number region A ∼ 40, low-lying normal-deformed (ND) and superdeformed (SD) bands with many-particle-many-hole (mp-mh) configurations have been confirmed experimentally in 36,38,40 Ar [4,12,15], 40 Ca [5], 42 Ca [1,9], and 44 Ti [11]. The SD band in 36 Ar, ND and SD bands in 40 Ca, and SD band in 44 Ti are considered to have configurations of 4p8h, 4p4h, 8p8h, and 8p4h, respectively, relative to the sd-shell doubleclosed structure.…”

“…In 42 Ca, deformed states with mp-mh configurations and clustering behavior have been observed experimentally, and the rotational band built on the J π = 0 + 2 (1.84 MeV) state (K π = 0 + 2 band) has been observed [1,9]. This rotational band has a large moment of inertia that is similar to the ones of the SD bands in 36 Ar and 40 Ca, scaled by A 5/3 [9], which is proportional to square of quadrupole deformation parameter β in the liquid-drop model.…”

O16+O16molecular structures of positive- and negative-parity superdeformed bands inTaniguchi1 2014Phys. Rev. C

“…With the development of techniques for γ spectroscopy experiments, superdeformed (SD) bands have been observed in the A ∼ 40 region, for example, in 36,38,40 Ar [1][2][3], 35 Cl [4], 40,42 Ca [5][6][7][8], and 44 Ti [9], and microscopic theoretical studies have shown that these bands have multiparticle-multihole (mp-mh) excited structures. Clustering is a typical structure in the light mass region, for example, in 8 Be, 12 C, 16 O, and 20 Ne [10,11]. In the A ∼ 30-40 region, cluster correlations in highly deformed states have also been discussed [12][13][14][15][16].…”