activity
20172026
most citedFirst direct mass measurements of nuclides around with a Multireflection Time-of-Flight Mass Spectrograph

73 citations · 189 across the 19 of their papers we have counts for

collaborators

19 papers

nucl-ex2026

Evolution of high-spin states in neutron-rich Au isotopes approaching the shell closure

Y. Cho, Y. H. Kim, A. Navin +48

\textbf{Background: } The nuclear structure in the region southwest of the doubly magic Pb is important to benchmark theoretical models relevant for neutron-rich heavy elem…

nucl-ex2026

High-Precision Mass Measurements of Proton-Rich Rh, Pd, Cd isotopes in the vicinity of 100Sn and Impact on X-Ray Burst and Supernova Nucleosynthesis

D. S. Hou, W. D. Xian, M. Rosenbusch +55

Using the ZeroDegree multi-reflection time-of-flight mass spectrograph of the CRISMASS project at RIKEN Radioactive Isotope Beam Factory, we performed high-precision mass measureme…

nucl-ex2025

New Ground State in La Removes Two-Neutron-Separation-Energy Anomaly in Lanthanum Isotopes

S. Kimura, M. Wada, H. Haba +9

Nuclear mass is a key indicator of how the nuclear shell structure evolves. The recent mass measurement study of neutron-rich lanthanum isotopes [A. Jaries, ., Phys. Rev. Le…

nucl-ex2025

Precision mass measurements around Mo rule out ZrNb cycle formation in the rapid proton-capture process at type I X-ray bursts

S. Kimura, M. Wada, C. Y. Fu +27

The rapid proton-capture (-) process is one of the primary, explosive thermonuclear burning processes that drive type I X-ray bursts. A possible termination of the -process…

nucl-ex2025★ 5 cited

Direct observation of and decay from a high-spin long-lived isomer in Ta

J. L. Chen, H. Watanabe, P. M. Walker +20

Ta (, ) is located in the neutron-rich region where a prolate-to-oblate shape transition via triaxial softness is predicted to take place. A pr…

physics.atom-ph2025

Anomalous nuclear effects on ion charge state distribution in helium gas

Sota Kimura, Michiharu Wada, Hiromitsu Haba +4

The influence of isotope differences on ion charge state yield ratios has never been studied in detail, having been considered negligible. However, we have observed anomalous ion c…

nucl-ex2024

Comprehensive mass measurement study of Cf fission fragments with MRTOF-MS and detailed study of masses of neutron-rich Ce isotopes

Sota Kimura, Michiharu Wada, Hiromitsu Haba +7

We report the mass measurements of neutron-rich isotopes produced via spontaneous fission of Cf using a multi-reflection time-of-flight mass spectrograph. The mass of ${}…

physics.ins-det2023★ 2 cited

Particle Identification at VAMOS++ with Machine Learning Techniques

Y. Cho, Y. H. Kim, S. Choi +45

Multi-nucleon transfer reaction between 136Xe beam and 198Pt target was performed using the VAMOS++ spectrometer at GANIL to study the structure of n-rich nuclei around N=126. Unam…

physics.ins-det2023

Increasing the rate capability for the cryogenic stopping cell of the FRS Ion Catcher

J. W. Zhao, D. Amanbayev, T. Dickel +45

At the FRS Ion Catcher (FRS-IC), projectile and fission fragments are produced at relativistic energies, separated in-flight, energy-bunched, slowed down, and thermalized in the ul…

physics.ins-det2022★ 1 cited

Design report of the KISS-II facility for exploring the origin of uranium

Takamichi Aoki, Yoshikazu Hirayama, Hironobu Ishiyama +14

One of the critical longstanding issues in nuclear physics is the origin of the heavy elements such as platinum and uranium. The r-process hypothesis is generally supported as the…

nucl-ex2022★ 28 cited

A new study of the and shell gap for Ti and V by the first high-precision MRTOF mass measurements at BigRIPS-SLOWRI

S. Iimura, M. Rosenbusch, A. Takamine +34

The atomic masses of Sc, Ti, and V have been determined using the high-precision multi-reflection time-of-flight technique. The radioisotopes have been p…

physics.ins-det2021

The new MRTOF mass spectrograph following the ZeroDegree spectrometer at RIKEN's RIBF facility

M. Rosenbusch, M. Wada, S. Chen +23

A newly assembled multi-reflection time-of-flight mass spectrograph (MRTOF-MS) at RIKEN's RIBF facility became operational for the first time in spring 2020; further modifications…

nucl-ex2021★ 11 cited

First direct observation of isomeric decay in neutron-rich odd-odd Ta

Y. X. Watanabe, P. M. Walker, Y. Hirayama +19

De-excitation rays associated with an isomeric state of Ta were investigated. The isomers were produced in multinucleon transfer reactions between a Xe beam and…

nucl-ex2021

Alpha-decay-correlated mass measurement of 206,207Ra using an -TOF detector equipped MRTOF-MS system

T. Niwase, M. Wada, P Schury +25

The atomic masses of the isotopes Ra have been measured via decay-correlated mass spectroscopy using a multi-reflection time-of-flight mass spectrograph equipped with a…

nucl-ex2020★ 23 cited

Properties of 187Ta revealed through isomeric decay

P. M. Walker, Y. Hirayama, G. J. Lane +20

Mass-separated 187Ta in a high-spin isomeric state has been produced for the first time by multi-nucleon transfer reactions, employing an argon gas stopping cell and laser ionisati…

nucl-ex2020

First high-precision direct determination of the atomic mass of a superheavy nuclide

P. Schury, T. Niwase, M. Wada +25

We present the first direct measurement of the atomic mass of a superheavy nuclide. Atoms of Db (=105) were produced online at the RIKEN Nishina Center for Accelerator-B…

physics.ins-det2019★ 15 cited

Development of an "-ToF" detector for correlated measurement of atomic masses and decay properties

T. Niwase, M. Wada, P. Schury +12

We have developed a novel detector, referred to as an "-ToF detector", for correlated measurements of atomic masses and decay properties of low-yield, short-lived radioactive is…

nucl-ex2018★ 31 cited

New mass anchor points for neutron-deficient heavy nuclei from direct mass measurements of radium and actinium isotopes

M. Rosenbusch, Y. Ito, P. Schury +17

The masses of the exotic isotopes Ac and Ra have been measured with a multi-reflection time-of-flight mass spectrograph. These isotopes were obtained in fli…

nucl-ex2017★ 73 cited

First direct mass measurements of nuclides around with a Multireflection Time-of-Flight Mass Spectrograph

Y. Ito, P. Schury, M. Wada +23

The masses of Es, Fm and the transfermium nuclei Md, and No, produced by hot- and cold-fusion reactions, in the vicinity of the deformed …