GAGG(Ce) is a novel scintillator that shows promise as a future material for gamma spectrometers. It has several benefits over traditional materials such as NaI(Tl) including its superior resolution (4.0±0.3%, Intrinsic FWHM at 662 keV), higher density, and it being non-hygroscopic [1][2]. A new scintillator-based array is planned to be deployed at the RIBF (Radioactive Isotope Beam Factory,...
The DALI2$^{+}$ array has well severed at RIBF, RIKEN for many years with fruitful research outcomes. However, the energy resolution of DALI2$^{+}$ array is far from adequate due to the intrinsic energy resolution of NaI crystal and the absence of interaction position reconstruction ability. Furthermore, the hygroscopic NaI crystal decays over time if the encapsulation is not good enough,...
Experimental data have shown that far from the valley of stability the nuclear shell structure evolves. New magic numbers can emerge and the traditional ones can disappear. In particular, two new magic numbers at N=32 and N=34 have been suggested in the vicinity of Z=20 based on $\gamma$-ray spectroscopy and mass measurements. In order to assess the impact of a single valence proton outside of...
The R3B setup at GSI employs many different detectors to study nuclear reactions. The CALorimeter for In Flight detection of gamma rays and high energy charged pArticles (CALIFA) is a highly segmented scintillation detector surrounding the target. It is formed from CsI(Tl) crystals, with a scintillation process formed from a fast and slow component with decay times of 700ns and 3.34s...
Low-lying states of 100Cd from one-proton removal reaction (101In, 100Cd+γ) have been studied using in-beam γ-ray spectroscopy at the Radioactive Isotope Beam Factory at RIKEN. A new method is proposed to separate peaks mixed together in the spectrum. Using this new method, two new γ transitions were identified and tentatively assigned as decays from two previously unknown states. The...
The calcium isotopes are an ideal test bench for studying the evolution of shell structure and magic numbers. Although many properties of surface nucleons in calcium have been successfully described by experiments and theories, it is still challenging to predict the shell structure for deeply bound nucleons. In this study, we report the first investigation of unbound states in 53Ca and 55Ca,...
