A5009196619- Nuclear physics research studies
- Nuclear Physics and Applications
- Atomic and Molecular Physics
- Astronomical and nuclear sciences
- Nuclear reactor physics and engineering
- Neutrino Physics Research
- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Mass Spectrometry Techniques and Applications
- Radiation Detection and Scintillator Technologies
- Advanced Chemical Physics Studies
- Particle accelerators and beam dynamics
- Atomic and Subatomic Physics Research
- Nuclear Materials and Properties
- Advanced NMR Techniques and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Particle Detector Development and Performance
- Laser-induced spectroscopy and plasma
- Isotope Analysis in Ecology
- Radioactive Decay and Measurement Techniques
- Astro and Planetary Science
- Gamma-ray bursts and supernovae
- Electron and X-Ray Spectroscopy Techniques
- Superconducting Materials and Applications
- Ion-surface interactions and analysis
University of Jyväskylä
2016-2025
Helsinki Institute of Physics
2017-2023
University of Helsinki
2017-2023
IMT Atlantique
2018-2022
Nantes Université
2018-2022
Institut National de Physique Nucléaire et de Physique des Particules
2018-2022
Centre National de la Recherche Scientifique
2015-2022
GSI Helmholtz Centre for Heavy Ion Research
2011-2022
Universitat de València
2019-2020
Instituto de Física Corpuscular
2019-2020
Atomic masses of the neutron-rich isotopes (76-80)Zn, (78-83)Ga, (80-85)Ge, (81-87)As, and (84-89)Se have been measured with high precision using Penning trap mass spectrometer JYFLTRAP at IGISOL facility. The (82,83)Ga, (83-85)Ge, (84-87)As, 89Se were for first time. These new data represent a major improvement in knowledge this region. Two-neutron separation energies provide evidence reduction N=50 shell gap energy towards germanium (Z=32) subsequent increase gallium (Z=31). are compared...
Atomic masses of $^{95--100}\mathrm{Sr}$, $^{98--105}\mathrm{Zr}$, and $^{102--110}\mathrm{Mo}$ have been measured with a precision 10 keV employing Penning trap setup at the IGISOL facility. Masses $^{104,105}\mathrm{Zr}$ $^{109,110}\mathrm{Mo}$ are for first time. Our improved results indicate significant deviations from previously published values deduced beta end point measurements. The most neutron-rich studied isotopes found to be significantly less bound (1 MeV) compared 2003 atomic...
The β feeding probability of Tc102,104,105,106,107, Mo105, and Nb101 nuclei, which are important contributors to the decay heat in nuclear reactors, has been measured using total absorption technique. We have coupled for first time a spectrometer Penning trap order obtain sources very high isobaric purity. Our results solve significant part long-standing discrepancy γ component Pu239 4–3000 s range.Received 13 May 2010DOI:https://doi.org/10.1103/PhysRevLett.105.202501© 2010 American Physical Society
Atomic masses of the neutron-rich isotopes $^{121--128}\mathrm{Cd}$, $^{129,131}\mathrm{In}$, $^{130--135}\mathrm{Sn}$, $^{131--136}\mathrm{Sb}$, and $^{132--140}\mathrm{Te}$ have been measured with high precision (10 ppb) using Penning-trap mass spectrometer JYFLTRAP. Among these, four $r$-process nuclei $^{135}\mathrm{Sn}$, $^{136}\mathrm{Sb}$, $^{139,140}\mathrm{Te}$ were for first time. An empirical neutron pairing gap expressed as odd-even staggering isotopic shows a strong quenching...
The rare-earth peak in the $r$-process abundance pattern depends sensitively on both astrophysical conditions and subtle changes nuclear structure region. This work takes an important step elucidating reducing uncertainties calculations via precise atomic mass measurements at JYFLTRAP double Penning trap. $^{158}$Nd, $^{160}$Pm, $^{162}$Sm, $^{164-166}$Gd have been measured for first time precisions $^{156}$Nd, $^{158}$Pm, $^{162,163}$Eu, $^{163}$Gd, $^{164}$Tb improved considerably. Nuclear...
Precision mass measurements of neutron-rich rhodium isotopes have been performed at the JYFLTRAP Penning trap spectrometer Ion Guide Isotope Separator On-Line (IGISOL) facility. We report results on ground- and isomeric-state masses in $^{110,112,114,116,118}\mathrm{Rh}$ very first measurement $^{120}\mathrm{Rh}$. The isomeric states were separated measured for time using phase-imaging ion-cyclotron-resonance (PI-ICR) technique. For $^{112}\mathrm{Rh}$, we also new half-lives both ground...
The masses of neutron-rich $^{106\ensuremath{-}112}\mathrm{Tc}$, $^{106\ensuremath{-}115}\mathrm{Ru}$, $^{108\ensuremath{-}118}\mathrm{Rh}$, and $^{112\ensuremath{-}120}\mathrm{Pd}$ produced in proton-induced fission uranium were determined using the JYFLTRAP double Penning trap setup. measured isotopic chains include a number previously unmeasured nuclei. Typical precisions on order 10 keV or better achieved, representing factor improvement over earlier data. In many cases, significant...
The Penning trap mass spectrometer JYFLTRAP, coupled to the Ion Guide Isotope Separator On-Line (IGISOL) facility at Jyväskylä, was employed measure atomic masses of neutron-rich 70-73Ni and 73, 75Cu isotopes with a typical accuracy less than 5keV. 73Ni measured for first time. Comparisons previous data are discussed. Two-neutron separation energies show weak subshell closure 68 28Ni40 . A well established proton shell gap is observed Z = 28
The rotational band structure of the Z=104 nucleus (256)Rf has been observed up to a tentative spin 20ℏ using state-of-the-art γ-ray spectroscopic techniques. This represents first such measurement in superheavy whose stability is entirely derived from shell-correction energy. properties are compared those neighboring nuclei and it shown that kinematic dynamic moments inertia sensitive underlying single-particle shell specific location high-j orbitals. therefore provide test pairing which...
A significant fraction of stars between 7 and 11 solar masses are thought to become supernovae, but the explosion mechanism is unclear. The answer depends critically on rate electron capture Ne20 in degenerate oxygen-neon stellar core. However, because unknown strength transition ground states F20, it has not previously been possible fully constrain rate. By measuring transition, we establish that its exceptionally large enhances by several orders magnitude. This a decisive impact evolution...
High-precision mass measurements of exotic ^{95-97}Ag isotopes close to the N=Z line have been conducted with JYFLTRAP double Penning trap spectrometer, silver ions produced using recently commissioned inductively heated hot cavity catcher laser ion source at Ion Guide Isotope Separator On-Line facility. The atomic ^{95}Ag was directly determined for first time. In addition, masses β-decaying 2^{+} and 8^{+} states in ^{96}Ag identified measured time, precision ^{97}Ag has improved. newly...
Using a new fast cleaning procedure to prepare isomerically pure ion samples, we have measured the beta-decay ${Q}_{\mathrm{EC}}$ values of superallowed $\ensuremath{\beta}$ emitters $^{50}\mathrm{Mn}$ and $^{54}\mathrm{Co}$ be 7634.48(7) 8244.54(10) keV, respectively, results which differ significantly from previously accepted values. The corrected $\mathcal{F}t$ derived our strongly support isospin-symmetry-breaking corrections that lead higher value up-down quark mixing element ${V}_{ud}$...
The β decays of 12N and 12B have been studied at KVI JYFL to resolve the composition broad interfering 0+ 2+ strengths in triple-α continuum. For first time a complete treatment 3α decay is presented including all major breakup channels. A multilevel, many-channel R-matrix formalism has developed for description combination with recently published separate analysis angular correlations. We find that, addition Hoyle state 7.65 MeV, more than one needed reproduce spectra. Broad 0+3 2+2 states...
A β-decaying high-spin isomer in (96)Cd, with a half-life T(1/2)=0.29(-0.10)(+0.11) s, has been established stopped beam rare isotope spectroscopic investigations at GSI (RISING) experiment. The nuclei were produced using the fragmentation of primary (124)Xe on (9)Be target. From and observed γ decays daughter nucleus, (96)Ag, we conclude that state is long predicted 16(+) "spin-gap" isomer. Shell-model calculations, Gross-Frenkel interaction πν(p(1/2),g(9/2)) model space, show isoscalar...
The double Penning trap mass spectrometer JYFLTRAP has been employed to measure masses and excitation energies for $11/{2}^{\ensuremath{-}}$ isomers in ${}^{121}$Cd, ${}^{123}$Cd, ${}^{125}$Cd, ${}^{133}$Te, $1/{2}^{\ensuremath{-}}$ ${}^{129}$In ${}^{131}$In, ${7}^{\ensuremath{-}}$ ${}^{130}$Sn ${}^{134}$Sb. These first direct measurements of the Cd In reveal deviations based on results from $\ensuremath{\beta}$-decay experiments yield new information neutron- proton-hole states close...
A cryogenic stopping cell (CSC) has been commissioned with 238U projectile fragments produced at 1000 MeV/u. The spatial isotopic separation in flight was performed the FRS applying a monoenergetic degrader. For first time, operated exotic nuclei temperatures (70 to 100 K). helium gas density of up used, about two times higher than reached before for RF ion repelling structures. An overall efficiency 15%, combined survival and extraction 50%, 24 ms were achieved heavy α-decaying uranium...