127 citations · 687 across the 28 of their papers we have counts for
28 papers
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…
Extending the low- "border'' of the region of deformation with precision mass spectrometry of Kr
D. Lunney, V. Manea, M. Mougeot +17
The onset of collective nuclear behavior in the , , region is examined through high-precision mass measurements of Kr, performed with the ISOLTRAP mas…
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 ${}…
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…
Charge radii, moments and masses of mercury isotopes across the N = 126 shell closure
T. Day Goodacre, A. V. Afanasjev, A. E. Barzakh +48
Combining laser spectroscopy in a Versatile Arc Discharge and Laser Ion Source, with Penning-trap mass spectrometry at the CERN-ISOLDE facility, this work reports on mean-square ch…
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…
Laser spectroscopy of neutron-rich Hg isotopes: Illuminating the kink and odd-even staggering in charge radii across the shell closure
T. Day Goodacre, A. V. Afanasjev, A. E. Barzakh +41
The mean-square charge radii of Hg () have been studied for the first time and those of Hg () remeasured by the applicat…
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…
Examining the = 28 shell closure through high-precision mass measurements of Ar
Maxime Mougeot, Dinko Atanasov, Carlo Barbieri +21
The strength of the = 28 magic number in neutron-rich argon isotopes is examined through high-precision mass measurements of Ar, performed with the ISOLTRAP mass spec…
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…
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…
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…
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…
Precision Mass Measurement of Cr: Nuclear Collectivity towards the \emph{N}=40 Island of Inversion
Maxime Mougeot, Dinko Atanasov, Klaus Blaum +22
The neutron-rich isotopes Cr were produced for the first time at the ISOLDE facility and their masses were measured with the ISOLTRAP spectrometer. The new values are up…
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…
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…
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 …
Atomic masses of intermediate-mass neutron-deficient nuclei with relative uncertainty down to 35-ppb via multireflection time-of-flight mass spectrograph
S. Kimura, Y. Ito, D. Kaji +18
High-precision mass measurements of Cu, Zn, Ga, Ge, As, Br, Rb, and Sr were performed utilizing a multireflection t…