Independent isotopic yields in 25 MeV and 50 MeV proton-induced fission of natU

Penttilä, H.; Gorelov, D.; Elomaa, V.‐V.; Eronen, T.; Hager, U.; Hakala, J.; Jokinen, A.; Kankainen, A.; Karvonen, P.; Moore, I. D.; Parkkonen, Joni; Perajärvi, K.; Pohjalainen, I.; Rahaman, S.; Rinta‐Antila, S.; Rissanen, J.; Rubchenya, V. A.; Saastamoinen, A.; Simutkin, Vasily; Sonoda, T.; Weber, C.; Voss, A.; Äystö, J.

doi:10.1140/epja/i2016-16104-4

Cited by 16 publications

(8 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[350]. In addition, independent isotopic fission yields have been studied thoroughly at IGISOL [659,660,661]. To reach even more neutron-rich nuclei, neutron-induced fission is being explored and developed at IGISOL [662].…”

Section: Igisol Facility In Jyväskylämentioning

confidence: 99%

r-process nucleosynthesis: connecting rare-isotope beam facilities with the cosmos

Horowitz

Arcones

Côté

et al. 2019

J. Phys. G: Nucl. Part. Phys.

166

113

View full text Add to dashboard Cite

This is an exciting time for the study of r-process nucleosynthesis. Recently, a neutron star merger GW170817 was observed in extraordinary detail with gravitational waves and electromagnetic radiation from radio to γ rays. The very red color of the associated kilonova suggests that neutron star mergers are an important r-process site. Astrophysical simulations of neutron star mergers and core collapse supernovae are making rapid progress. Detection of both, electron neutrinos and antineutrinos from the next galactic supernova will constrain the composition of neutrino-driven winds and provide unique nucleosynthesis information. Finally FRIB and other rare-isotope beam facilities will soon have dramatic new capabilities to synthesize many neutron-rich nuclei that are involved in the r-process. The new capabilities can significantly improve our understanding of the r-process and likely resolve one of the main outstanding problems in classical nuclear astrophysics.However, to make best use of the new experimental capabilities and to fully interpret the results, a great deal of infrastructure is needed in many related areas of astrophysics, astronomy, and nuclear theory. We will place these experiments in context by discussing astrophysical simulations and observations of r-process sites, observations of stellar abundances, galactic chemical evolution, and nuclear theory for the structure and reactions of very neutron-rich nuclei. This review paper was initiated at a three-week International Collaborations in Nuclear Theory program in June 2016 where we explored promising r-process experiments and discussed their likely impact, and their astrophysical, astronomical, and nuclear theory context.

show abstract

Section: Igisol Facility In Jyväskylämentioning

confidence: 99%

r-process nucleosynthesis: connecting rare-isotope beam facilities with the cosmos

Horowitz

Arcones

Côté

et al. 2019

J. Phys. G: Nucl. Part. Phys.

166

113

View full text Add to dashboard Cite

show abstract

“…The EC = 857.63 (17) keV from this work is a factor of nearly 20 times more precise than that derived from the evaluated masses in AME2020 [54,49]. The measured EC value has a deviation of -2.57 keV from the AME2020 value, 860.2 (34) keV. The value in AME2020 was derived primarily from the difference between the atomic mass of the parent 111 In and that of the daughter 111 Cd species as listed therein.…”

Section: -Value Determinationmentioning

confidence: 58%

“…The EC value of 111 In, the mass difference of the parent nucleus 111 In and its EC decaying daughter 111 Cd, was measured at the new Ion Guide Isotope Separator On-Line facility (IGISOL) utilizing the JYFLTRAP double Penning trap mass spectrometer [30,31], at the University of Jyväskylä [32,33]. A primary beam of protons with an energy of 40 MeV from the K-130 cyclotron impinged into a naturally abundant indium target with a thickness of a few mg/cm 2 at the entrance of the IGISOL gas cell [34]. The secondary products produced from fusion-evaporation reaction were stopped in helium gas and extracted with the help of a sextupole ion guide (SPIG) [35], a linear Paul trap with a sextupole electrode configuration.…”

Section: Experimental Methodsmentioning

confidence: 99%

High-precision electron-capture $Q$ value measurement of $^{111}$In for electron-neutrino mass determination

Ge,

Eronen,

deRoubin

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

A precise determination of the ground state 111 In (9∕2 + ) electron capture to ground state of 111 Cd (1∕2 + ) value has been performed utilizing the double Penning trap mass spectrometer, JYFLTRAP. A value of 857.63(17) keV was obtained, which is nearly a factor of 20 more precise than the value extracted from the Atomic Mass Evaluation 2020 (AME2020). The high-precision electron-capture value measurement along with the nuclear energy level data of 866.60(6) keV, 864.8(3) keV, 855.6(10) keV, and 853.94(7) keV for 111 Cd was used to determine whether the four states are energetically allowed for a potential ultra-low -value decay or electron-capture decay. Our results confirm that the excited states of 866.60(6) keV with spin-parity ( ) of 3/2 + and 864.8(3) keV with = 3/2 + are ruled out due to their deduced electron-capture value being smaller than 0 keV at the level of around 20 and 50 , respectively. Electron-capture decays to the excited states at 853.94( 7) keV ( = 7/2 + ) and 855.6( 10) keV ( = 3/2 + ), are energetically allowed with values of 3.69(19) keV and 2.0(10) keV, respectively. The allowed decay transition 111 In (9/2 + ) → 111 Cd (7/2 + ), with a value of 3.69( 19) keV, is a potential a new candidate for neutrino-mass measurements by future EC experiments featuring new powerful detection technologies. The results show that the indium level 2 1∕2 for this decay branch leads to a significant increase in the number of EC events in the energy region sensitive to the electron neutrino mass.

show abstract

“…In these experiments one strives for sub-eV mass sensitivity, which necessitates the use of nuclear decays of as small as possible decay energy (Q-value) in order to reduce the background at the end point, from which the neutrino mass is extracted. The corresponding Q-values are Q β = 18.5718 (12) keV for KATRIN [5], Q β = 2.4666 (16) keV for MARE [6] and Q EC = 2.858(10)(50) keV for ECHo [7] with its statistical and systematic uncertainties, respectively.…”

mentioning

confidence: 99%

“…Since it is not possible to separate 135 Bað11=2 − Þ and 135 Csð7=2 þ Þ that have nearly identical mass with currently available separation techniques [14,15], a fission reaction was chosen to produce 135 Cs ions. Based on a semiempirical fit to the independent fission yield data to theoretical models [16], the 135 Bað11=2 − Þ yield was expected to be a factor of 100 less than 135 Csð7=2 þ Þ. The reference 135 Bað3=2 þ Þ ions were separately produced with an offline glow-discharge ion source [17].…”

mentioning

confidence: 99%

High-Precision Q -Value Measurement Confirms the Potential of Cs135 for Absolute Antineutrino Mass Scale Determination

et al. 2020

Self Cite

View full text Add to dashboard Cite

The ground-state-to-ground-state β-decay Q value of 135 Csð7=2 þ Þ → 135 Bað3=2 þ Þ has been directly measured for the first time. The measurement was done utilizing both the phase-imaging ion-cyclotron resonance technique and the time-of-flight ion-cyclotron resonance technique at the JYFLTRAP Penningtrap setup and yielded a mass difference of 268.66(30) keV between 135 Csð7=2 þ Þ and 135 Bað3=2 þ Þ. With this very small uncertainty, this measurement is a factor of 3 more precise than the currently adopted Q value in the Atomic Mass Evaluation 2016. The measurement confirms that the first-forbidden unique β −-decay transition 135 Csð7=2 þ Þ → 135 Bað11=2 − Þ is a candidate for antineutrino mass measurements with an ultralow Q value of 0.44(31) keV. This Q value is almost an order of magnitude smaller than those of nuclides presently used in running or planned direct (anti)neutrino mass experiment.

show abstract

Independent isotopic yields in 25 MeV and 50 MeV proton-induced fission of natU

Cited by 16 publications

References 47 publications

r-process nucleosynthesis: connecting rare-isotope beam facilities with the cosmos

r-process nucleosynthesis: connecting rare-isotope beam facilities with the cosmos

High-precision electron-capture $Q$ value measurement of $^{111}$In for electron-neutrino mass determination

High-Precision Q -Value Measurement Confirms the Potential of Cs135 for Absolute Antineutrino Mass Scale Determination

Contact Info

Product

Resources

About