A new measurement of 25Al+p resonant scattering was performed up to the astrophysically interested energy region of 22Mg(a, p)25Al. Several resonances were observed in the excitation functions, and their level properties have been determined based on an R-matrix analysis. An improved reaction rate of 22Mg(a, p)25Al was determined based on the level properties of the corresponding resonances....
To evaluate the neutron capture reaction on 79Se, we have studied the (d,p) reaction on 79Se in inverse kinematics at OEDO. To evalute the spin-dependent gamma emission probabilities at the unbound states, the reaction mechanism of the transfer reaction is needed to be cleared. We studied the double differential cross section of the trasnfer reaction, which are in good agreement with the...
X-ray bursts are interesting astrophysical phenomena that occur in binary star systems of neutron stars and companion stars. As the results of the X-ray bursts, the heavy elements up to the Sn-Te region can be synthesized within only a few seconds. The $^{26}$Si($\alpha$,$p$)$^{29}$P nuclear reaction rate plays a crucial role in understanding the X-ray burst phenomena, since the reaction rate...
This is condensed from the article in Astrophys. J. Lett. 915, L13 (2021).
The cosmological lithium problem (CLP) stems from the outstanding discrepancy between theoretical predictions and astronomical observations of primordial lithium abundances. For the radiogenic production of 7Li, 7Be plays a pivotal role in the Big Bang nucleosynthesis (BBN). Nevertheless, the data for neutron-induced...
Molecules containing radioactive heavy elements can be produced to serve as sensitive probes to study the origin of the fundamental symmetry violation. In this report, the experimental possibilities to search for the electron electric dipole moment (EDM) using the several candidate of the molecules with the heavy element will be discussed, and the EDM enhancement factor is evaluated using the...
For high-precision measurement of giant monopole resonance, it is necessary to measure the momentum of beam particle and recoil particles in the vicinity of reaction point with high precision. we have developed a new compact time projection chamber (Mini TPC) that can be irradiated with high-intensity heavy-ion beams, and performed heavy-ion beam irradiation experiments at HIMAC. In present...
We report a magneto-optical trap (MOT) to produce a cold francium source. Since francium has no stable isotope and its production is limited, a high-efficiency trap is needed. We have succeeded in rubidium MOT and optimized trap parameters to maximize the number of capture atoms using rubidium.
Direct photon production at midrapidity in inelastic and high-multiplicity proton-proton (pp) collisions at a center-of-mass energy of $\sqrt{s}$ = 13 TeV at the LHC via virtual photon method are reported. The contributions from light-hadron decays are calculated from their measured cross sections in pp collisions at √s = 13 TeV in same charged multiplicity class. The contributions from...
W propose a new workflow of shell-model calculations using a method called eigenvector continuation (EC).
It enables us to efficiently approximate the eigenpairs under a given Hamiltonian by previously sampled eigenvectors.
This paper describes ALICE global commissioning performed in 2021 and achievements with pilot beams in 2021.
We have designed ion optics at OEDO-SHARAQ for high-resolution spectroscopy and reported CNS annual report 2018. In the present volume, we will report a demonstration of the beam transport with the ion-optical design.
Report on ion optics study of BigRIPS-OEDO for 130Sn(d,p) experiment.
TBA
Upgrade of the CAT-M and its performance evaluation, and the deuteron inelastic scattering measurement on 132Xe, 80Kr, 86Kr at HIMAC will be summarized
Direct photon production via internal conversion $\gamma^{*} \to e^{+}e^{-}$ is discussed in this article.
We performed quasi-particle vacua shell-model calculations for even-even Nd and Sm isotopes. We discuss shape transition of Nd and Sm isotopes and neutrinoless double-beta decay nuclear matrix element of 150Nd.
The sudden onset of the deformation has been well known around 100Zn. This phenomenon is called as the quantum phase transition. In the theoretical calculations with the shell model framework, the deformation starts in the second 0+ state at 96Zr. We studied the inelastic decay to the scond 0+ state from the isobaric analog resonances of 97Zr by proton scattering on 96Zr at Kyushu University....
The development of the framework for the ALICE-TPC space-charge distortion correction using machine learning methods will be discussed in this article.
Giant monopole resonance of high spin isomer are one of the most attractive topics in the view of the resonance energy by comparing these energy of the isomer with ground sate.
To achieve high beam intensity and isomer ratio for the GMR experiment, we need to optimize some prameter in the fragmentation reaction.
In this report, we will show the result and discussion of the angular momentum...
We performed the missing mass spectroscopy of the three-neutron system via the 3H(t,3He)3n reaction at 170 MeV/u with the spectrometer SHARAQ. This was a first tritium target experiment at RIBF. We report on the experimental conditions.
We are aiming at the first observation of the giant resonance state in the double Gamow–Teller transition (Double Gamow–Teller Giant Resonance, DGTGR).
We utilize the double-charge exchange reaction ($^{12}$C, $^{12}$Be(0$^{+}_{2}$)) reaction for the observation of the DGTGR.
We performed the first measurement of the ($^{12}$C, $^{12}$Be(0$^{+}_{2}$)) at RIBF in May 2021.
In this...
This is the report of the study on beam viewer photography technique of the emittance monitor for the accelerated ion beams by AVF Cyclotron.
Neutron-rich Pm (
Z
=
61
) isotopes were studied by delayed
γ
-ray spectroscopy at RIBF, RIKEN Nishina Center using the in-flight fission of a 345 MeV/nucleon
238
U
beam. A cluster-type Ge detector array, EURICA, was used to measure the delayed
γ
rays from stopped ions. Isomeric
γ
decays were observed in
159
Pm
and
161
Pm
with half-lives of 4.97(12)
μ
s
and...
