A3F-CNS Summer School 2020

Session

Young Scientist Session 1

YSS1

17 Aug 2020, 15:30

30. Position Sensitive Detector Development for use in the Rare Radio-Isotope Ring

Mr George Hudson-Chang (Spin-Isospin Lab, Riken Nishina Center)

17/08/2020, 15:30

In accelerator physics, particle beams require constant fine tuning for nominal operation. As such, beam monitoring carries great importance. Detectors with position measurement capabilities are required to enact such beam diagnosis whilst causing minimum disruption to the beam quality. A detector of this type is required at the Rare Radio-Isotope Ring at the Radio Isotope Beam Factory (RIBF)...

54. Development of fast-response and high-resolution position detector for high-intensity RI beam

Shutaro Hanai (CNS,the university of Tokyo)

17/08/2020, 15:45

High-intensity radioactive isotope (RI) beams provide various opportunities to perform important studies of nuclear physics. In the experiment, position detectors have an essential role in the measurement of momentum and emittance, and particle identification. Common technique used for position deduction in conventional detectors such as Delay-line parallel plate avalanche counter (DL-PPAC)...

53. Performance evaluation of ionization chamber used for particle identification of heavy ion beams

Mr Hiroyuki Takahashi (Tokyo City University)

17/08/2020, 16:00

Ionization chambers are often used as $\mathit{\Delta }$E detectors for particle identification of heavy ion beams in RI beam facilities. The energy resolution of the ionization chamber is relatively high compared with that of solid detectors such as Si semiconductor with the same thickness in units of g/cm${}^2$.

Pfutzner et al. proposed that the high energy resolution of the ionization...

42. Evaluation of the astrophysical rates of the ${}^{42}$Ti$(p,\gamma {)}^{43}$V and ${}^{43}$V$(p,\gamma {)}^{44}$Cr reactions

KimUyen Nguyen (Sungkyunkwan University)

17/08/2020, 16:20

In this study we estimated the astrophysical rates of the ${}^{42}$Ti$(p,\gamma {)}^{43}$V and ${}^{43}$V$(p,\gamma {)}^{44}$Cr reactions and their variations due to mass uncertainties of the ${}^{43}$V and ${}^{44}$Cr exotic nuclei in the rp-process. The associated photodisintegration related to the $(p,\gamma )-(\gamma ,p)$ equilibrium is also considered. The results show that the photodisintegration-rate...

2. Developed plunger facility for ps lifetimes and g- factor of short lived states at IMP

Dr Aman Rohilla (Institute of Modern Physics, Chinese Academy of Sciences)

17/08/2020, 16:35

A new plunger based facility has been recently developed at Institute of Modern Physics (IMP), Lanzhou. This facility will be used to measure the nuclear level lifetimes in ns-ps range and the g-factor, providing deep insight into the study of nuclear wave functions and structure of nucleus. It is based on the plunger technique of Alexander and Bell [1], well known at present for the...

32. Nuclear transmutation of high-radiotoxic nuclide ${}^{90}$Sr via proton- and deuteron-induced reactions in inverse kinematics

Mr Riku Matsumura (Saitama University)

17/08/2020, 16:50

Processing of spent fuel from nuclear power plants is a worldwide problem. The high-level radioactive waste is the product after the reprocessing of spent fuel, which includes minor actinides and fission products of radioactive waste. Especially, ${}^{90}$Sr (T${}_{1/2}$ = 28.8 years) is the highest radiotoxic nuclide in the fission products. It is highly desired to develop nuclear transmutation...

38. Proton charge radius measurement

Clement Legris (Tohoku University, ELPH)

17/08/2020, 17:10

The proton is one of the essential bricks of matter, alongside with neutron; we know its mass, its charge but not its radius. Before 2010, the proton charge radius was thought to be known by physicists, measurements of the proton charge radius converged to a value of 0.8775±0.051 fm [1] using two different methods: electron scattering and hydrogen spectroscopy. However, in 2010 a German team...

5. Studying the exotic decay of ${}^{70}$Kr $\to$ ${}^{70}$Br

Andras Vitez-Sveiczer (Institute for Nuclear Research (Atomki))

17/08/2020, 17:25

The $\beta$-decay of ${}^{70}$Kr can be used to test the predictions of different theoretical models. First of all, the effects of $T=0$ pn-pairing can be investigated through the study of the decay rates [1]. Furthermore the theoretical strength distributions of the $\beta$-decay of ${}^{70}$Kr show clear differences depending on the shape of the ground state, hence assumptions on the shape of...

3. Probing surface α clustering in the ground state of stable heavy nuclei

Junki Tanaka (Riken, Nishina Center)

17/08/2020, 17:40

George Gamow, about 90 years ago, famously proposed an explanation of α decay phenomena utilizing the quantum tunneling effect of preformed α particles[1]. Since then, α clusters are considered as a prerequisite in heavy nuclei, but the clear experimental evidence of its existence has not been reported until today. Instead, α clustering at the low-density nuclear surface could be one plausible...