73 citations · 317 across the 24 of their papers we have counts for
24 papers
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…
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…
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…
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…
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…
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…
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 ${}…
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…
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…
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…
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…
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…
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…
Reduction of contaminants originating from primary beam by improving the beam stoppers in GARIS-II
Sota Kimura, Daiya Kaji, Yuta Ito +4
Two independent beam stoppers have been developed for improving the beam separation of the gas-filled recoil ion separator GARIS-II. Performance evaluation of these supplemental be…
High precision mass measurements of the isomeric and ground states of V: improving constraints on the IMME parameters of the A=44, quintet
D. Puentes, G. Bollen, M. Brodeur +16
The Isobaric Multiplet Mass Equation (IMME) has been successful at predicting the masses of isobaric analogue states in the same multiplet, while its coefficients are known to foll…
Accurately accounting for effects on times-of-flight caused by finite field-transition times during the ejection of ions from a storage trap: A study for TOF and MRTOF mass spectrometry
M. Rosenbusch, P. Schury, M. Wada +3
In applied forms of time-of-flight mass spectrometry utilizing ion storage devices prior to an analysis device, a non instantaneous electric ejection pulse applied in the region of…
An inexpensive biasing system for use in electrostatic steering of ions
P. Schury
We introduce a compact design for an electronic device capable of superposing 8 bias voltages up to 96~V on a voltage of up to 5~kV. Such a device has been implemented to prov…
High-stability, high-voltage power supplies for use with multi-reflection time-of-flight mass spectrographs
P. Schury, M. Wada, H. Wollnik J-Y. Moon +2
Achieving the highest possible mass resolving power in a multi-reflection time-of-flight mass spectrometer requires very high-stability power supplies. To this end, we have develop…
Improving wide-band mass measurements in a multi-reflection time-of-flight mass spectrograph by usage of a concomitant measurement scheme
P. Schury, Y. Ito, M. Rosenbusch +3
We introduce a new concomitant referencing mode for operating a multi-reflection time-of-flight mass spectrograph (MRTOF-MS), wherein the reference and analyte ions are interleaved…
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 …
In-gas-cell laser spectroscopy for magnetic dipole moment of Pt toward 126
Y. Hirayama, M. Mukai, Y. X. Watanabe +10
Magnetic dipole moment and mean-square charge radius of Pt ( 5/2) have been evaluated for the first time from the investigation of the hyperfine splitting of the…
First Online Mass Measurements of Isobar Chains via Multi-Reflection Time-of-Flight Mass Spectrograph Coupled with GARIS-II
P. Schury, M. Wada, Y. Ito +16
Using a mulit-reflection time-of-flight mass spectrograph (MRTOF-MS) located after a gas cell coupled with the gas-filled recoil ion separator GARIS-II, the masses of several heavy…
A novel ion cooling trap for multi-reflection time-of-flight mass spectrograph
Y. Ito, P. Schury, M. Wada +8
A radiofrequency quadrupole ion trap system for use with a multi-reflection time-of-flight mass spectrograph (MRTOF) for short-lived nuclei has been developed. The trap system cons…
Development of a resonant laser ionization gas cell for high-energy, short-lived nuclei
T. Sonoda, M. Wada, H. Tomita +21
A new laser ion source configuration based on resonant photoionization in a gas cell has been developed at RIBF RIKEN. This system is intended for the future PArasitic RI-beam prod…