Direct reactions and spectroscopy with hydrogen targets: past 10 years at the RIBF and future prospects

Session

Shell migration at the neutron numbers N=32,34 around Ca

31 Jul 2023, 13:35

Hilton York Hotel

85. Overview of shell evolution in the N=28-40 region and its analogy to IoI

Yutaka Utsuno (Japan Atomic Energy Agency)

31/07/2023, 13:35

Invited talk

Neutron-rich nuclei in the N=28-40 region provide a good testing ground of shell evolution. The conventional N=28 magic number is known to be disappear in S, Si, and Mg isotopes, and a new magic number N=34 had been predicted since 2001. One of the most important ingredients to cause those phenomena is the monopole interaction between a proton in the sd shell and a neturon in the pf shell. In...

65. Structure of Ca isotopes at N = 34 shell closure and above

S. Chen

31/07/2023, 14:05

The studies in the past decades revealed that the canonical magic numbers established for stable nuclei may not extend their universality to exotic nuclei, while new magic numbers emerge in some nuclei [1]. These new features often can be traced back to certain characteristic mechanisms of nuclear forces [1,2], for instance, the tensor force, which can vary the spin-orbit energy splitting and...

4. Extended p3/2 Neutron Orbital and the N = 32 Shell Closure in 52Ca

Madalina Enciu (INSTITUT FÜR KERNPHYSIK DER TECHNISCHEN UNIVERSTITÄT DARMSTADT)

31/07/2023, 14:30

Invited talk

The $^{52}$Ca(p,pn)$^{51}$Ca reaction was measured in inverse kinematics during the SEASTAR3 experimental campaign at the Radioactive Isotope Beam Factory (RIBF). The proton-induced quasi-free neutron knock-out reaction was performed at ∼230 MeV/nucleon using MINOS, a 150-mm long liquid hydrogen target and the MINOS TPC, combined with prompt $\gamma$ spectroscopy. Inclusive and exclusive cross...

91. Global ab initio calculations for the structure of exotic nuclei

Jason Holt (TRIUMF)

31/07/2023, 15:25

Invited talk

Breakthroughs in our treatment of the many-body problem and nuclear forces are rapidly transforming modern nuclear theory into a true first-principles discipline. This allows us to address some of the most exciting questions at the frontiers of nuclear structure and physics beyond the standard model.
In this talk I will briefly outline our many-body approach, the valence-space in-medium...

86. Spectroscopy of 52Ar and 54Ca with (p,2p) and (p,3p) reactions

Dr Hongna Liu (Beijing Normal Univerisity)

31/07/2023, 15:50

Invited talk

Shell gaps represent the backbone of the nuclear structure and are a direct fingerprint of the in-medium many-body interactions. The nuclear shell structure is found to change, sometimes drastically, with the number of protons and neutrons, revealing how delicate the arrangement of interacting nucleons is. Recent experimental evidence favors a new doubly-magic nucleus 54Ca with a neutron...

60. Detailed spectroscopy of the non-canonically doubly magic 54Ca

Frank Browne (CERN)

31/07/2023, 16:15

Invited talk

The nuclear magic numbers correspond to large energy gaps between successive nucleon orbits. In stable nuclei, these correspond to 2, 8, 20, 28, 50, 82, and 126, however, in exotic nuclei the 20 and 28 magic numbers are known to disappear, whilst 32 and 34 emerge as "non-canonical" magic numbers. The latter was first inferred through $\gamma$-ray spectroscopy of $^{54}$Ca at the RIBF, with...

84. Onset of collectivity for argon isotopes close to N = 32

ALAIN GILLIBERT (CEA Saclay)

Invited talk

The neutron number N=32 has been recently proposed to be a new magic number for neutron-rich nuclei far from stability, such as 52Ca. This statement relies on different experimental measurements, such as mass-measurements, high excitation energy for the first 2+ state of even-even nuclei and low B(E2) values. The calcium isotopic distribution is well documented, in addition with many...

64. tbd

Y. Utsuno

Invited talk

66. TBD

H. Liu

67. TBD

J. Holt

68. TBD

A. Gilibert