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NSR database version of May 22, 2024.

Search: Author = V.Rakopoulos

Found 12 matches.

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2022GA10      Eur.Phys.J. A 58, 27 (2022)

Z.Gao, A.Al-Adili, L.Canete, T.Eronen, D.Gorelov, A.Kankainen, M.Lantz, A.Mattera, I.D.Moore, D.A.Nesterenko, H.Penttila, I.Pohjalainen, S.Pomp, V.Rakopoulos, S.Rinta-Antila, M.Vilen, J.Aysto, A.Solders

Benchmark of a multi-physics Monte Carlo simulation of an ion guide for neutron-induced fission products

NUCLEAR REACTIONS U(n, F), Ti(n, X), E<30 MeV; measured reaction products, Eγ, Iγ. 95Zr, 95Nb, 99Mo, 103Ru, 127Sb, 131,132I, 140Ba, 140La, 141Ce, 143Ce, 147Nd, 46Sc, 47Ca, 48Sc, 237U; deduced R values for each observed γ-ray transition belonging to fission products. Comparison with GEF, MCNPX and Geant4 calculations. The University of Jyvaskyla, the Ion Guide Isotope Separator On-Line (IGISOL) technique.

doi: 10.1140/epja/s10050-022-00676-z
Citations: PlumX Metrics


2020AL22      Phys.Rev. C 102, 064610 (2020)

A.Al-Adili, D.Tarrio, K.Jansson, V.Rakopoulos, A.Solders, S.Pomp, A.Gook, F.-J.Hambsch, S.Oberstedt, M.Vidali

Prompt fission neutron yields in thermal fission of 235U and spontaneous fission of 252Cf

NUCLEAR REACTIONS 235U(n, F), E=thermal; measured fission fragments, E(n), I(n), (fission fragment)n-coin using a Twin Frisch-Grid Ionization Chamber (TFGIC) and two liquid scintillation detectors at the 7 MV Van de Graaff facility in JRC-Geel; deduced mass yields and two-dimensional mass versus total kinetic energy (TKE) distributions, average prompt fission neutron spectra (PFNS), contribution from forward and backward neutron-fragment coincidences, preneutron emission mass yields, TKE distributions versus preneutron emission mass, prompt-fission neutron yield as a function of preneutron mass and TKE, neutron spectrum in the center-of-mass system as a function of fragment mass. Detailed Fluka simulations, and comparison with data from SCINTIA neutron array, other experimental results, and Wahl evaluation. Need for a new evaluation of the prompt-fission neutron multiplicity.

RADIOACTIVITY 252Cf(SF); measured fission fragments, E(n), I(n), (fission fragment)n-coin using a Twin Frisch-Grid Ionization Chamber (TFGIC) and two liquid scintillation detectors at the 7 MV Van de Graaff facility in JRC-Geel; deduced mass distributions, with and without neutron coincidence, prompt-fission neutrons as a function of fragment mass and total kinetic energy (TKE), neutron spectrum in the laboratory system, kinetic energy distributions, average prompt fission neutron spectra (PFNS), contribution from forward and backward neutron-fragment coincidences, preneutron emission mass yields, TKE distributions versus preneutron emission mass, prompt-fission neutron yield as a function of preneutron mass and TKE, average neutron multiplicity as function of mass number and TKE, neutron spectrum in the center-of-mass system as a function of fragment mass. Comparison with previous experimental results.

doi: 10.1103/PhysRevC.102.064610
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 dataset23764.


2019AL18      Eur.Phys.J. A 55, 61 (2019)

A.Al-Adili, V.Rakopoulos, A.Solders

Extraction of angular momenta from isomeric yield ratios

NUCLEAR STRUCTURE 136Xe; calculated angular momentum distribution for different spin cut-off parameter using classical level density formula, angular momentum, neutron multiplicity and E* vs fragment mass.

NUCLEAR REACTIONS 238U(n, f), E=thermal; calculated de-excitation of fission fragments after prompt-fission neutron emission followed by prompt γ-rays, angular momentum, neutron multiplicity and E* vs fragment mass using TALYS and GEF codes.Compared with data.

doi: 10.1140/epja/i2019-12731-5
Citations: PlumX Metrics


2019RA01      Phys.Rev. C 99, 014617 (2019)

V.Rakopoulos, M.Lantz, S.Pomp, A.Solders, A.Al-Adili, L.Canete, T.Eronen, A.Jokinen, A.Kankainen, A.Mattera, I.D.Moore, D.A.Nesterenko, M.Reponen, S.Rinta-Antila, A.de Roubin, M.Vilen, M.Osterlund, H.Penttila

Isomeric fission yield ratios for odd-mass Cd and In isotopes using the phase-imaging ion-cyclotron-resonance technique

NUCLEAR REACTIONS U(p, F)81Ge/81mGe/119Cd/119mCd/121Cd/121mCd/123Cd/123mCd/125Cd/125mCd/127Cd/127mCd/119In/119mIn/121In/121mIn/123In/123mIn/125In/125mIn/127In/127mIn/129Sb/129mSb, E=25 MeV; measured isomeric yield ratios of fission products using the JYFLTRAP double Penning trap, and phase-imaging ion cyclotron-resonance (PI-ICR) technique at IGISOL facility of University of Jyvaskyla; deduced average rms angular momentum using TALYS code, and correlation between electric quadrupole moments and average angular momentum for In and Cd isotopes.

doi: 10.1103/PhysRevC.99.014617
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO2395.


2018MA24      Eur.Phys.J. A 54, 33 (2018)

A.Mattera, S.Pomp, M.Lantz, V.Rakopoulos, A.Solders, A.Al-Adili, H.Penttila, I.D.Moore, S.Rinta-Antila, T.Eronen, A.Kankainen, I.Pohjalainen, D.Gorelov, L.Canete, D.Nesterenko, M.Vilen, J.Aysto

Production of Sn and Sb isotopes in high-energy neutron-induced fission of natU

NUCLEAR REACTIONS U(n, F), E=30 MeV[end energy of white neutron spectrum30 MeV, weighted neutron energy about 12 MeV]; measured Eγ, Iγ. 129,130,131Sn, 130,132Sb; deduced cumulative fission yields, isomeric yield ratios, calculated yields using GEF model. Compared with other data and with ENDF/B-VII.1, JEFF 3.1.1.

doi: 10.1140/epja/i2018-12462-1
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 dataset23414.


2018RA19      Phys.Rev. C 98, 024612 (2018)

V.Rakopoulos, M.Lantz, A.Solders, A.Al-Adili, A.Mattera, L.Canete, T.Eronen, D.Gorelov, A.Jokinen, A.Kankainen, V.S.Kolhinen, I.D.Moore, D.A.Nesterenko, H.Penttila, I.Pohjalainen, S.Rinta-Antila, V.Simutkin, M.Vilen, A.Voss, S.Pomp

First isomeric yield ratio measurements by direct ion counting and implications for the angular momentum of the primary fission fragments

NUCLEAR REACTIONS U, 232Th(p, F)81Ge/81mGe/96Y/96mY/97Y/97mY/128Sn/128mSn/130Sn/130mSn/129Sb/129mSb, E=25 MeV; measured fission fragment time of flight, mass, isomeric yield ratios using JYFLTRAP for fragment separation and microchannel plate for particle detection at IGISOL-Jyvaskyla facility. Comparison with theoretical calculations of fission fragment isomeric yield ratios and rms spin of fragments using GEF code and TALYS code with constant temperature Fermi gas model, back-shifted Fermi gas model (BSFG), and the microscopic level densities of Goriely. Comparison with previous experimental values.

doi: 10.1103/PhysRevC.98.024612
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO2429.


2017MA57      Eur.Phys.J. A 53, 173 (2017)

A.Mattera, S.Pomp, M.Lantz, V.Rakopoulos, A.Solders, A.Al-Adili, E.Passoth, A.V.Prokofiev, P.Andersson, A.Hjalmarsson, R.Bedogni, D.Bortot, A.Esposito, A.Gentile, J.M.Gomez-Ros, M.V.Introini, A.Pola, D.Gorelov, H.Penttila, I.D.Moore, S.Rinta-Antila, V.S.Kolhinen, T.Eronen

A neutron source for IGISOL-JYFLTRAP: Design and characterisation

doi: 10.1140/epja/i2017-12362-x
Citations: PlumX Metrics


2015AL11      Eur.Phys.J. A 51, 59 (2015)

A.Al-Adili, K.Jansson, M.Lantz, A.Solders, D.Gorelov, C.Gustavsson, A.Mattera, I.Moore, A.V.Prokofiev, V.Rakopoulos, H.Penttila, D.Tarrio, S.Wiberg, M.Osterlund, S.Pomp

Simulations of the fission-product stopping efficiency in IGISOL

doi: 10.1140/epja/i2015-15059-2
Citations: PlumX Metrics


2014GO10      Acta Phys.Pol. B45, 211 (2014)

D.Gorelov, J.Hakala, A.Jokinen, V.Kolhinen, J.Koponen, I.Moore, H.Penttila, I.Pohjalainen, M.Reponen, S.Rinta-Antila, V.Sonnenschein, A.Voss, A.Al-Adili, M.Lantz, A.Mattera, S.Pomp, V.Rakopoulos, V.Simutkin, A.Solders, J.Aysto

Isomeric Yield Ratios of Fission Products Measured with the JYFLTRAP

NUCLEAR REACTIONS 238U(p, X)81Ge/81Ga/81As, E=25 MeV; measured reaction products, Eγ, Iγ; deduced isomeric yield ratios of fission products.

doi: 10.5506/APhysPolB.45.211
Citations: PlumX Metrics


2014MA64      Nucl.Data Sheets 119, 416 (2014)

A.Mattera, M.Lantz, S.Pomp, V.Rakopoulos, A.Solders, P.Andersson, A.Hjalmarsson, J.Valldor-Blucher, A.V.Prokofiev, E.Passoth, D.Gorelov, H.Penttila, S.Rinta-Antila, R.Bedogni, A.Gentile, D.Bortot, A.Esposito, M.V.Introini, A.Pola

Characterization of a Be(p, xn) Neutron Source for Fission Yields Measurements

doi: 10.1016/j.nds.2014.08.117
Citations: PlumX Metrics


2014SO14      Nucl.Data Sheets 119, 338 (2014)

A.Solders, D.Gorelov, A.Jokinen, V.S.Kolhinen, M.Lantz, A.Mattera, H.Penttila, S.Pomp, V.Rakopoulos, S.Rinta-Antila

Accurate Fission Data for Nuclear Safety

doi: 10.1016/j.nds.2014.08.093
Citations: PlumX Metrics


2012PA34      Nucl.Instrum.Methods Phys.Res. B290, 72 (2012)

V.Paneta, M.Kokkoris, A.Lagoyannis, V.Rakopoulos

Differential cross-section measurements of the d + 19F reaction channels for NRA purposes

NUCLEAR REACTIONS 19F(d, p), (d, α), E=1.8-3 MeV; measured Ep, Ip, Eα, Iα; deduced σ(θ). Comparison with available data, SIMNRA code calculations.

doi: 10.1016/j.nimb.2012.08.015
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO2066.


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