M. Reponen
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View article: Enhanced sensitivity for electron affinity measurements of rare elements
Enhanced sensitivity for electron affinity measurements of rare elements Open
The electron affinity (EA), the energy released when a neutral atom binds an additional electron, is a fundamental property of atoms that is governed by electron-electron correlations and is strongly related to an element’s chemical reacti…
View article: Direct mass measurement of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mmultiscripts> <mml:mi>Pd</mml:mi> <mml:mprescripts/> <mml:none/> <mml:mn>93</mml:mn> </mml:mmultiscripts> </mml:math> and implications for the isomer structures in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mmultiscripts> <mml:mi>Ag</mml:mi> <mml:mprescripts/> <mml:none/> <mml:mn>94</mml:mn> </mml:mmultiscripts> </mml:math> : Tracing the two-proton decay branch
Direct mass measurement of and implications for the isomer structures in : Tracing the two-proton decay branch Open
The first direct mass measurement of Pd 93 , the one-proton-decay daughter of the ( 21 + ) isomer in Ag 94 , has been performed, resulting in a mass excess value of − 59 127 ( 35 ) keV and reducing the mass uncertain…
View article: Study of beta spectrum shapes relevant to the prediction of reactor antineutrino spectra
Study of beta spectrum shapes relevant to the prediction of reactor antineutrino spectra Open
The shapes of the beta spectra of 92Rb and 142Cs, two of the beta decays most relevant for the prediction of the antineutrino spectrum in reactors, have been measured. A new setup composed of two dE-E telescopes has been used. High purity …
View article: Binding energies, charge radii, spins, and moments: Odd-odd Ag isotopes and discovery of a new isomer
Binding energies, charge radii, spins, and moments: Odd-odd Ag isotopes and discovery of a new isomer Open
We report on the masses and hyperfine structure of ground and isomeric states in 114,116,118,120 Ag isotopes, measured with the phase-imaging ion-cyclotron-resonance technique (PI-ICR) with the JYFLTRAP mass spectrometer and the collinear …
View article: Isomeric states of fission fragments explored via Penning trap mass spectrometry at IGISOL
Isomeric states of fission fragments explored via Penning trap mass spectrometry at IGISOL Open
The masses of $^{84}$Br, $^{105}$Mo, $^{115,119,121}$Pd, $^{122}$Ag,\n$^{127,129}$In, $^{132}$Sb and their respective isomeric states have been\nmeasured with the JYFLTRAP Penning trap mass spectrometer using the\nphase-imaging ion-cyclotr…
View article: Precision mass measurements in the zirconium region pin down the mass surface across the neutron midshell at N = 66
Precision mass measurements in the zirconium region pin down the mass surface across the neutron midshell at N = 66 Open
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View article: Probing the N=104 midshell region for the r process via precision mass\n spectrometry of neutron-rich rare-earth isotopes with the JYFLTRAP double\n Penning trap
Probing the N=104 midshell region for the r process via precision mass\n spectrometry of neutron-rich rare-earth isotopes with the JYFLTRAP double\n Penning trap Open
We have performed high-precision mass measurements of neutron-rich rare-earth\nTb, Dy and Ho isotopes using the Phase-Imaging Ion-Cyclotron-Resonance\ntechnique at the JYFLTRAP double Penning trap. We report on the first\nexperimentally de…
View article: Recent experiments on photo-assisted negative ion production in caesium sputter ion source at the JYFL Pelletron facility
Recent experiments on photo-assisted negative ion production in caesium sputter ion source at the JYFL Pelletron facility Open
We have measured the effect of a 15 W, 445 nm laser on Br − beam current produced by a SNICS ion source by systematically varying the ion source parameters, most importantly the target holder material, and temperatures of the ioniser and C…
View article: First investigation on the isomeric ratio in multinucleon transfer reactions: Entrance channel effects on the spin distribution
First investigation on the isomeric ratio in multinucleon transfer reactions: Entrance channel effects on the spin distribution Open
The multinucleon transfer (MNT) reaction approach was successfully employed for the first time to measure the isomeric ratios (IRs) of 211Po isomer (25/2+) and its ground state (9/2+) at the IGISOL facility using a 945 MeV 136Xe beam impin…
View article: High-precision measurement of the atomic mass of $^{84}$Sr and implications to isotope shift studies
High-precision measurement of the atomic mass of $^{84}$Sr and implications to isotope shift studies Open
The absolute mass of $^{84}$Sr was determined using the phase-imaging ion-cyclotron-resonance technique with the JYFLTRAP double Penning trap mass spectrometer. A more precise value for the mass of $^{84}$Sr is essential for providing pote…
View article: Precision mass measurements in the zirconium region pin down the mass surface across the neutron midshell at $N=66$
Precision mass measurements in the zirconium region pin down the mass surface across the neutron midshell at $N=66$ Open
Precision mass measurements of $^{104}$Y, $^{106}$Zr, $^{104,104m,109}$Nb, and $^{111,112}$Mo have been performed with the JYFLTRAP double Penning trap mass spectrometer at the Ion Guide Isotope Separator On-Line facility. The order of the…
View article: Mass measurements in the $^{132}$Sn region with the JYFLTRAP double Penning trap mass spectrometer
Mass measurements in the $^{132}$Sn region with the JYFLTRAP double Penning trap mass spectrometer Open
We report on new precision mass measurements of neutron-rich $^{137}$Sb and $^{136-142}$I isotopes from the JYFLTRAP double Penning trap mass spectrometer. We confirm the value from the previous Penning-trap measurement of $^{137}$Sb at th…
View article: High-precision mass measurements of neutron deficient silver isotopes probe the robustness of the $N$ = 50 shell closure
High-precision mass measurements of neutron deficient silver isotopes probe the robustness of the $N$ = 50 shell closure Open
High-precision mass measurements of exotic $^{95-97}$Ag isotopes close to the $N = Z$ line have been conducted with the JYFLTRAP double Penning trap mass spectrometer, with the silver ions produced using the recently commissioned inductive…
View article: Opportunities for fundamental physics research with radioactive molecules
Opportunities for fundamental physics research with radioactive molecules Open
Molecules containing short-lived, radioactive nuclei are uniquely positioned to enable a wide range of scientific discoveries in the areas of fundamental symmetries, astrophysics, nuclear structure, and chemistry. Recent advances in the ab…
View article: First investigation on the isomeric ratio in multinucleon transfer reactions: Entrance channel effects on the spin distribution
First investigation on the isomeric ratio in multinucleon transfer reactions: Entrance channel effects on the spin distribution Open
The multinucleon transfer (MNT) reaction approach was successfully employed for the first time to measure the isomeric ratios (IRs) of $^{211}$Po (25/2$^+$) isomer and its (9/2$^+$) ground state at the IGISOL facility using a 945 MeV $^{13…
View article: Binding energies of ground and isomeric states in neutron-rich ruthenium isotopes: Measurements at JYFLTRAP and comparison to theory
Binding energies of ground and isomeric states in neutron-rich ruthenium isotopes: Measurements at JYFLTRAP and comparison to theory Open
We report on precision mass measurements of 113,115,117Ru performed with the JYFLTRAP double Penning trap mass spectrometer at the Accelerator Laboratory of University of Jyväskylä. The phase-imaging ion-cyclotron-resonance technique was u…
View article: Nuclear charge radius of $^{26m}$Al and its implication for V$_{ud}$ in the quark-mixing matrix
Nuclear charge radius of $^{26m}$Al and its implication for V$_{ud}$ in the quark-mixing matrix Open
Collinear laser spectroscopy was performed on the isomer of the aluminium isotope $^{26m}$Al. The measured isotope shift to $^{27}$Al in the $3s^{2}3p\;^{2}\!P^\circ_{3/2} \rightarrow 3s^{2}4s\;^{2}\!S_{1/2}$ atomic transition enabled the …
View article: Photo-assisted Cl<sup>-</sup>, Br<sup>-</sup> and I<sup>-</sup> production in caesium sputter ion source
Photo-assisted Cl<sup>-</sup>, Br<sup>-</sup> and I<sup>-</sup> production in caesium sputter ion source Open
We have measured the effect of 445 nm, high power diode laser, directed on the cathode of a SNICS ion source on the extracted beam currents of Cl - , Br - and I - ion beams. Beam current enhancement factors up to 9 were observed in Cs-depl…
View article: High-precision measurements of low-lying isomeric states in $^{120-124}$In with JYFLTRAP double Penning trap
High-precision measurements of low-lying isomeric states in $^{120-124}$In with JYFLTRAP double Penning trap Open
Neutron-rich $^{120-124}$In isotopes have been studied utilizing the double Penning trap mass spectrometer JYFLTRAP at the IGISOL facility. Using the phase-imaging ion-cyclotron-resonance technique, the isomeric states were resolved from g…
View article: Offline commissioning of a new gas cell for the MARA Low-Energy Branch
Offline commissioning of a new gas cell for the MARA Low-Energy Branch Open
Results of offline commissioning tests for a new dedicated gas cell for the Mass Analysing Recoil Apparatus (MARA) Low-Energy Branch are reported. Evacuation time, ion survival and transport efficiency in helium buffer gas were characteriz…
View article: RAPTOR: a new collinear laser ionization spectroscopy and laser-radiofrequency double-resonance experiment at the IGISOL facility
RAPTOR: a new collinear laser ionization spectroscopy and laser-radiofrequency double-resonance experiment at the IGISOL facility Open
RAPTOR, Resonance ionization spectroscopy And Purification Traps for Optimized spectRoscopy, is a new collinear resonance ionization spectroscopy device constructed at the Ion Guide Isotope Separator On-Line (IGISOL) facility at the Univer…
View article: Opportunities for Fundamental Physics Research with Radioactive Molecules
Opportunities for Fundamental Physics Research with Radioactive Molecules Open
Molecules containing short-lived, radioactive nuclei are uniquely positioned to enable a wide range of scientific discoveries in the areas of fundamental symmetries, astrophysics, nuclear structure, and chemistry. Recent advances in the ab…
View article: Odd-odd neutron-rich rhodium isotopes studied with the double Penning trap JYFLTRAP
Odd-odd neutron-rich rhodium isotopes studied with the double Penning trap JYFLTRAP Open
Precision mass measurements of neutron-rich rhodium isotopes have been\nperformed at the JYFLTRAP Penning trap mass spectrometer at the Ion Guide\nIsotope Separator On-Line (IGISOL) facility. We report results on ground- and\nisomeric-stat…
View article: Results of DTAS Campaign at IGISOL: Overview
Results of DTAS Campaign at IGISOL: Overview Open
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