NSR Query Results

Output year order : Descending
Format : Normal

NSR database version of April 26, 2024.

Search: Author = P.Chhetri

Found 11 matches.

Back to query form

2023KR02      Nature(London) 617, 706 (2023)

S.Kraemer, J.Moens, M.Athanasakis-Kaklamanakis, S.Bara, K.Beeks, P.Chhetri, K.Chrysalidis, A.Claessens, T.E.Cocolios, J.G.M.Correia, H.De Witte, R.Ferrer, S.Geldhof, R.Heinke, N.Hosseini, M.Huyse, U.Koster, Y.Kudryavtsev, M.Laatiaoui, R.Lica, G.Magchiels, V.Manea, C.Merckling, L.M.C.Pereira, S.Raeder, T.Schumm, S.Sels, P.G.Thirolf, S.M.Tunhuma, P.Van Den Bergh, P.Van Duppen, A.Vantomme, M.Verlinde, R.Villarreal, U.Wahl

Observation of the radiative decay of the ²²⁹Th nuclear clock isomer

RADIOACTIVITY ²²⁹Ac(β^-), ²²⁹Th(IT) [from U(p, X), E=1.4 GeV]; measured decay products, Eγ, Iγ; deduced isomeric transition energies and T_1/2. Comparison with available data. The ISOLDE facility at CERN.

doi: 10.1038/s41586-023-05894-z
Citations: PlumX Metrics
Data from this article have been entered in the XUNDL database. For more information, click here.

2023KR05      Nucl.Instrum.Methods Phys.Res. B542, 1 (2023)

S.Kraemer, P.Chhetri, S.Bara, A.Claessens, H.De Witte, Y.Elskens, R.Ferrer, Y.Kudryavtsev, S.Sels, P.Van Den Bergh, P.Van Duppen

A setup for vacuum-ultraviolet spectroscopy of the ²²⁹Th low-energy isomer

RADIOACTIVITY ²²⁹Th(IT), ²²⁹Ac(β^-); measured decay products; deduced photon spectra, the isomeric decay, the uncertainty on the isomer's excitation energy. The ISOLDE facility.

doi: 10.1016/j.nimb.2023.05.029
Citations: PlumX Metrics

2022KA45      Phys.Rev. C 106, 054325 (2022)

O.Kaleja, B.Andjelic, O.Bezrodnova, K.Blaum, M.Block, S.Chenmarev, P.Chhetri, C.Droese, Ch.E.Dullmann, M.Eibach, S.Eliseev, J.Even, P.Filianin, F.Giacoppo, S.Gotz, Yu.Gusev, M.J.Gutierrez, F.P.Hessberger, N.Kalantar-Nayestanaki, J.J.W.van de Laar, M.Laatiaoui, S.Lohse, N.Martynova, E.Minaya Ramirez, A.K.Mistry, T.Murbock, Yu.Novikov, S.Raeder, D.Rodriguez, F.Schneider, L.Schweikhard, P.G.Thirolf, A.Yakushev

Direct high-precision mass spectrometry of superheavy elements with SHIPTRAP

ATOMIC MASSES ^251,254No, ^254,255,256Lr, ²⁵⁷Rf; measured cyclotron frequency; deduced mass excesses, two-neutron shell gap. Comparison to AME2020. Phase-imaging ion-cyclotron resonance mass spectrometry (PI-ICR MS) at SHIPTRAP setup. Isotopes produced in following reactions ²⁰⁶Pb(⁴⁸Ca, 3n)²⁵¹No, E=4.8 MeV/nucleon, ²⁰⁸Pb(⁴⁸Ca, 2n)²⁵⁴No, E=4.56 MeV/nucleon, ²⁰⁹Bi(⁴⁸Ca, 3n)²⁵⁴Lr, E=4.81 MeV/nucleon, ²⁰⁹Bi(⁴⁸Ca, 2n)²⁵⁵Lr, E=4.56 MeV/nucleon, ²⁰⁹Bi(⁴⁸Ca, n)²⁵⁶Lr, E=4.5 MeV/nucleon, ²⁰⁸Pb(⁵⁰Ti, n)²⁵⁷Rf, E=4.65 MeV/nucleon at GSI Darmstadt.

RADIOACTIVITY ²⁵⁸Db, ²⁵⁴Lr(α); deduced Q values. Comparison to other experimental data.

doi: 10.1103/PhysRevC.106.054325
Citations: PlumX Metrics

2022NO01      Phys.Rev. C 105, L021302 (2022)

S.Nothhelfer, Th.E.Albrecht-Schonzart, M.Block, P.Chhetri, Ch.E.Dullmann, J.G.Ezold, V.Gadelshin, A.Gaiser, F.Giacoppo, R.Heinke, T.Kieck, N.Kneip, M.Laatiaoui, Ch.Mokry, S.Raeder, J.Runke, F.Schneider, J.M.Sperling, D.Studer, P.Thorle-Pospiech, N.Trautmann, F.Weber, K.Wendt

Nuclear structure investigations of ^253-255Es by laser spectroscopy

NUCLEAR MOMENTS ^253,254,255Es; measured hyperfine spectra; deduced J, isotope shifts, hyperfine constants, nuclear spins, magnetic dipole moments, electric quadrupole moments. Comparison with previous experimental data. Laser resonance ionization spectroscopy. RISIKO mass separator at Johannes Gutenberg University Mainz.

doi: 10.1103/PhysRevC.105.L021302
Citations: PlumX Metrics
Data from this article have been entered in the XUNDL database. For more information, click here.

2019MI08      Nucl.Phys. A987, 337 (2019)

A.K.Mistry, J.Khuyagbaatar, F.P.Hessberger, D.Ackermann, B.Andel, S.Antalic, M.Block, P.Chhetri, F.Dechery, C.Droese, Ch.E.Dullmann, F.Giacoppo, J.Hoffmann, O.Kaleja, N.Kurz, M.Laatiaoui, L.Lens, J.Maurer, P.Mosat, J.Piot, S.Raeder, M.Vostinar, A.Yakushev, Z.Zhang

The ⁴⁸Ca+¹⁸¹Ta reaction: Cross section studies and investigation of neutron-deficient 86 ≤ Z ≤ 93 isotopes

NUCLEAR REACTIONS ¹⁸¹Ta(⁴⁸Ca, x)²²⁹Np, E(cm)=212, 217, 226 MeV[energies based on σ predictions by the HIVAP code]; measured xn, αxn, pxn leading to ²²⁵Np, ²²⁵U, ²²⁴Np, Evaporation Residues (ER) separated from ⁴⁸Ca primary beam using the SHIP velocity filter at GSI, ToF and COMPAct Spectroscopy Set-up (COMPASS) comprising of DSSDs and SSSDs; deduced ²²⁵U, ^225,226,229Np decay chains; ²¹³Rn, ^213,214,215Fr, ^217,218,219Ac, ²²¹Th, ^221,222,223Pa, ²²⁵U, ^225,226Np; deduced decay data, T_1/2; compared with literature values; compiled production σ maxima in 3n and 4n evaporation channels from compound nuclei with Z=83-94 and projectiles ⁴⁰Ar, ^40,44,48Ca, ⁵⁰Ti using published experimental data.

doi: 10.1016/j.nuclphysa.2019.05.003
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD8010. Data from this article have been entered in the XUNDL database. For more information, click here.

2018AC08      Nucl.Instrum.Methods Phys.Res. A907, 81 (2018)

D.Ackermann, A.K.Mistry, F.P.Hessberger, B.Andel, S.Antalic, M.Block, L.Caceres, P.Chhetri, F.Dechery, Ch.Droese, Ch.E.Dullmann, F.Giacoppo, J.Hoffmann, O.Kaleja, O.Kamalou, N.Kurz, J.Khuyagbaatar, R.R.Mandl, T.Murbock, M.Laatiaoui, J.Maurer, P.Mosat, J.Piot, S.Raeder, H.Savajols, O.Sorlin, Ch.Stodel, J.C.Thomas, M.Vostinar, P.Wieczorek, A.Yakushev, Z.Zhang

COMPASS-A COMPAct decay spectroscopy set-up

RADIOACTIVITY ²⁵³No(α) [from ²⁰⁷Pb(⁴⁸Ca, 2n), E not given]; measured decay products, Eγ, Iγ, Eα, Iα, α-γ-coin.; deduced α-decay spectrum, branching ratios.

doi: 10.1016/j.nima.2018.01.096
Citations: PlumX Metrics
Data from this article have been entered in the XUNDL database. For more information, click here.

2018CH45      Acta Phys.Pol. B49, 599 (2018)

P.Chhetri, C.S.Moodley, S.Raeder, M.Block, F.Giacoppo, S.Gotz, F.P.Hessberger, M.Eibach, O.Kaleja, M.Laatiaoui, A.K.Mistry, T.Murbock, Th.Walther

Investigation of the First Ionization Potential of Ytterbium in Argon Buffer Gas

ATOMIC PHYSICS Yb; measured photoexcitation to excite Rydberg states in ^natYb (chemical homologue of No) using the fact of recent observation of such states in No (Z=102) inside buffer gas cell; measured Rydberg levels with a similar principle quantum number as observed on-line for No using laser resonance ionization spectroscopy ultra-sensitive method based on RAdiation Detected Resonance Ionization Spectroscopy (RADRIS) technique in a buffer gas environment laser resonance ionization spectroscopy in a buffer gas cell to determine the ionization potential of Yb (Z=70); deduced Rydberg states energy, principal quantum number, ionization potentials and the dependence on gas pressure; extrapolated ionization potential in vacuum; compared with literature value.

doi: 10.5506/aphyspolb.49.599
Citations: PlumX Metrics

2018MI11      Acta Phys.Pol. B49, 613 (2018)

A.K.Mistry, Z.Zhang, F.P.Hessberger, D.Ackermann, B.Andel, S.Antalic, M.Block, P.Chhetri, F.Dechery, C.Droese, Ch.E.Dullmann, F.Giacoppo, J.Hoffmann, O.Kaleja, J.Khuyagbaatar, N.Kurz, M.Laatiaoui, J.Maurer, P.Mosat, J.Piot, S.Raeder, M.Vostinar, A.Yakushev

Decay Spectroscopy of Heavy Isotopes at SHIP Using the COMPASS Focal Plane Detection Set-up

RADIOACTIVITY ²⁵⁰Fm, ²⁵⁴No(α)[Nobelium from ⁴⁸Ca(²⁰⁸Pb, 2n), E=4.55 MeV/nucleon]; measured Eα, Iα(time), αα-coin; deduced α-decay energy spectrum, Iα vs time, T_1/2, α_Fmα_No correlation, T_1/2. ²²²Th, ²¹⁸Ra, ²¹⁴Rn(α)[from α-decays ²³⁰Pu to ²²⁶U to ²³²Th to²¹⁸Ra to ²¹⁴Rn]; measured α-decay trace ²²²Th to ²¹⁸Ra to n, Eα, Iα(time), αα-coin, αα-correlations; deduced summary of α-decay chains starting with ²²⁷U, ²²⁹Np, ^229,230Pu using also literature references.

doi: 10.5506/aphyspolb.49.613
Citations: PlumX Metrics

2018RA11      Phys.Rev.Lett. 120, 232503 (2018)

S.Raeder, D.Ackermann, H.Backe, R.Beerwerth, J.C.Berengut, M.Block, A.Borschevsky, B.Cheal, P.Chhetri, Ch.E.Dullmann, V.A.Dzuba, E.Eliav, J.Even, R.Ferrer, V.V.Flambaum, S.Fritzsche, F.Giacoppo, S.Gotz, F.P.Hessberger, M.Huyse, U.Kaldor, O.Kaleja, J.Khuyagbaatar, P.Kunz, M.Laatiaoui, F.Lautenschlager, W.Lauth, A.K.Mistry, E.Minaya Ramirez, W.Nazarewicz, S.G.Porsev, M.S.Safronova, U.I.Safronova, B.Schuetrumpf, P.Van Duppen, T.Walther, C.Wraith, A.Yakushev

Probing Sizes and Shapes of Nobelium Isotopes by Laser Spectroscopy

NUCLEAR MOMENTS ^252,253,254No; measured excitation spectra, hyperfine structure components; deduced nuclear magnetic and quadrupole moments, charge radii. Comparison with the state-of-the-art nuclear density functional calculations.

doi: 10.1103/PhysRevLett.120.232503
Citations: PlumX Metrics
Data from this article have been entered in the XUNDL database. For more information, click here.

2017GI07      Acta Phys.Pol. B48, 423 (2017)

F.Giacoppo, K.Blaum, M.Block, P.Chhetri, Ch.E.Dullmann, C.Droese, S.Eliseev, P.Filianin, S.Gotz, Y.Gusev, F.Herfurth, F.P.Hessberger, O.Kaleja, J.Khuyagbaatar, M.Laatiaoui, F.Lautenschlager, C.Lorenz, G.Marx, E.Minaya Ramirez, A.Mistry, Yu.N.Novikov, W.R.Plass, S.Raeder, D.Rodriguez, D.Rudolph, L.G.Sarmiento, C.Scheidenberger, L.Schweikhard, P.Thirolf, A.Yakushev

Recent Upgrades of the SHIPTRAP Setup: On the Finish Line Towards Direct Mass Spectroscopy of Superheavy Elements

doi: 10.5506/APhysPolB.48.423
Citations: PlumX Metrics

2016LA25      Nature(London) 535, 495 (2016)

M.Laatiaoui, W.Lauth, H.Backe, Mi.Block, D.Ackermann, B.Cheal, P.Chhetri, C.E.Dullmann, P.van Duppen, J.Even, R.Ferrer, F.Giacoppo, S.Gotz, F.P.Hessberger, M.Huyse, O.Kaleja, J.Khuyagbaatar, P.Kunz, F.Lautenschlager, A.K.Mistry, S.Raeder, E.Minaya Ramirez, T.Walther, C.Wraith, A.Yakushev

Atom-at-a-time laser resonance ionization spectroscopy of nobelium

NUCLEAR REACTIONS ^206,208Pb(⁴⁸Ca, 2n), E=217 MeV; measured reaction products; deduced σ, ground-state transition, an upper limit for the ionization potential of nobelium.

doi: 10.1038/nature19345
Citations: PlumX Metrics