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NSR database version of May 10, 2024.

Search: Author = A.Keenan

Found 42 matches.

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2011PA24      Phys.Rev. C 84, 034308 (2011)

R.D.Page, A.N.Andreyev, D.R.Wiseman, P.A.Butler, T.Grahn, P.T.Greenlees, R.-D.Herzberg, M.Huyse, G.D.Jones, P.M.Jones, D.T.Joss, R.Julin, S.Juutinen, H.Kankaanpaa, A.Keenan, H.Kettunen, P.Kuusiniemi, M.Leino, M.Muikku, P.Nieminen, P.Rahkila, G.I.Rainovski, C.Scholey, J.Uusitalo, K.Van de Vel, P.Van Duppen

In-beam conversion-electron spectroscopy of 180Hg

NUCLEAR REACTIONS 147Sm(36Ar, 3n), E=168 MeV; measured E(ce), I(ce) using; Silicon Array Conversion Electron Detection (SACRED) spectrometer; deduced K/L ratios. 180Hg; deduced levels, J, π, multipolarities.

doi: 10.1103/PhysRevC.84.034308
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2006BA09      Phys.Rev. C 73, 024308 (2006)

J.E.Bastin, R.-D.Herzberg, P.A.Butler, G.D.Jones, R.D.Page, D.G.Jenkins, N.Amzal, P.M.T.Brew, N.J.Hammond, R.D.Humphreys, P.J.C.Ikin, T.Page, P.T.Greenlees, P.M.Jones, R.Julin, S.Juutinen, H.Kankaanpaa, A.Keenan, H.Kettunen, P.Kuusiniemi, M.Leino, A.P.Leppanen, M.Muikku, P.Nieminen, P.Rahkila, C.Scholey, J.Uusitalo, E.Bouchez, A.Chatillon, A.Hurstel, W.Korten, Y.Le Coz, Ch.Theisen, D.Ackermann, J.Gerl, K.Helariutta, F.P.Hessberger, Ch.Schlegel, H.J.Wollersheim, M.Lach, A.Maj, W.Meczynski, J.Styczen, T.L.Khoo, C.J.Lister, A.V.Afanasjev, H.J.Maier, P.Reiter, P.Bednarczyk, K.Eskola, K.Hauschild

In-beam gamma ray and conversion electron study of 250Fm

NUCLEAR REACTIONS 204Hg(48Ca, 2n), E ≈ 205-216 MeV; measured Eγ, Iγ; deduced excitation function. 204Hg(48Ca, 2n), E=210 MeV; measured Eγ, Iγ, E(ce), I(ce), (recoil)γ-, (recoil)(ce)-, γγ-, (ce)γ-coin. 250Fm deduced levels, J, π, ICC, deformation. Jurosphere IV array, recoil-decay tagging..

RADIOACTIVITY 250Fm(α) [from 204Hg(48Ca, 2n)]; measured T1/2.

doi: 10.1103/PhysRevC.73.024308
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2005GR36      Eur.Phys.J. A 25, Supplement 1, 599 (2005)

P.T.Greenlees, N.Amzal, J.E.Bastin, E.Bouchez, P.A.Butler, A.Chatillon, O.Dorvaux, S.Eeckhaudt, K.Eskola, B.Gall, J.Gerl, T.Grahn, A.Gorgen, N.J.Hammond, K.Hauschild, R.-D.Herzberg, F.-P.Hessberger, R.D.Humphreys, A.Hurstel, D.G.Jenkins, G.D.Jones, P.Jones, R.Julin, S.Juutinen, H.Kankaanpaa, A.Keenan, H.Kettunen, F.Khalfallah, T.L.Khoo, W.Korten, P.Kuusiniemi, Y.Le Coz, M.Leino, A.-P.Leppanen, M.Muikku, P.Nieminen, J.Pakarinen, P.Rahkila, P.Reiter, M.Rousseau, C.Scholey, Ch.Theisen, J.Uusitalo, J.Wilson, H.-J.Wollersheim

In-beam and decay spectroscopy of transfermium elements

RADIOACTIVITY 255Lr, 251Md(α) [from 209Bi(48Ca, 2n) and subsequent decay]; measured Eα, αα-coin; deduced excited state decay.

NUCLEAR REACTIONS 205Tl(48Ca, 2n), E=218 MeV; measured Eγ, Iγ, (recoil)γ-coin. Jurogam array.

NUCLEAR STRUCTURE 248,250Fm, 251Md, 252,254No; analyzed rotational bands moments of inertia.

doi: 10.1140/epjad/i2005-06-026-0
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2005JO17      J.Phys.(London) G31, S1593 (2005)

D.T.Joss, N.Amzal, D.E.Appelbe, T.Back, C.J.Barton, M.A.Bentley, B.Cederwall, J.F.C.Cocks, D.M.Cullen, S.Eeckhaudt, T.Grahn, P.T.Greenlees, B.Hadinia, K.Helariutta, P.M.Jones, R.Julin, S.Juutinen, H.Kankaanpaa, A.Keenan, H.Kettunen, S.L.King, P.Kuusiniemi, K.Lagergren, M.Leino, A.P.Leppanen, M.Muikku, P.Nieminen, R.D.Page, J.Pakarinen, E.S.Paul, P.Rahkila, C.Scholey, A.Savelius, J.Simpson, M.J.Taylor, J.Uusitalo, S.J.Williams, D.D.Warner, D.R.Wiseman, R.Wyss

Probing structural changes in the very neutron-deficient Os isotopes with recoil-decay tagging

NUCLEAR STRUCTURE 162,164,166,168,169,170Os; analyzed level energies; deduced shape transition features.

doi: 10.1088/0954-3899/31/10/039
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2005KE10      Eur.Phys.J. A 25, Supplement 1, 181 (2005)

H.Kettunen, T.Enqvist, K.Eskola, T.Grahn, P.T.Greenlees, K.Helariutta, P.Jones, R.Julin, S.Juutinen, H.Kankaanpaa, A.Keenan, H.Koivisto, P.Kuusiniemi, M.Leino, A.-P.Leppanen, M.Muikku, P.Nieminen, J.Pakarinen, P.Rahkila, J.Uusitalo

Decay studies of neutron-deficient odd-mass At and Bi isotopes

NUCLEAR REACTIONS 142Nd(56Fe, 2np), E=262 MeV; 141Pr(56Fe, 4n), E=266 MeV; 141Pr(54Fe, 4n), E=260 MeV; measured production σ.

RADIOACTIVITY 191,193,195At(α); measured Eα, Eγ, γα-coin. 191,193,195At deduced levels, J, π, configurations, proton separation energies. 187,189,191Bi deduced levels J, π, configurations. Comparison with theory.

doi: 10.1140/epjad/i2005-06-114-1
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2005UU02      Phys.Rev. C 71, 024306 (2005)

J.Uusitalo, M.Leino, T.Enqvist, K.Eskola, T.Grahn, P.T.Greenlees, P.Jones, R.Julin, S.Juutinen, A.Keenan, H.Kettunen, H.Koivisto, P.Kuusiniemi, A.-P.Leppanen, P.Nieminen, J.Pakarinen, P.Rahkila, C.Scholey

α decay studies of very neutron-deficient francium and radium isotopes

NUCLEAR REACTIONS 141Pr(65Cu, xnypzα), E=283-293 MeV; measured delayed Eα, Iα, αα-, (recoil)α-coin; deduced evidence for 199,200,201Rn, 202,203,204Fr, 203,204Ra. 141Pr(63Cu, xnypzα), E=278-288 MeV; measured delayed Eα, Iα, αα-, (recoil)α-coin; deduced evidence for 198,199,200,201,202Rn, 201,202Fr, 201,202Ra. 170Yb(36Ar, xnypzα), E=180-185 MeV; measured delayed Eα, Iα, αα-, (recoil)α-coin; deduced evidence for 201Fr, 203Ra. Gas-filled recoil separator.

RADIOACTIVITY 201,202,203,204Ra, 197,198,199,200Rn, 193,194,195,196Po, 201,202,203,204Fr, 197,198,199,200At(α) [from 141Pr(63,65Cu, xnypzα), 170Yb(36Ar, xnypzα), and subsequent decay]; measured Eα, T1/2, αα-coin for ground and metastable state decay. 193,195Bi, 197,199At, 201,203Fr deduced levels, J, π. Comparisons with previous results.

doi: 10.1103/PhysRevC.71.024306
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2004GR10      Eur.Phys.J. A 20, 87 (2004)

P.T.Greenlees, A.N.Andreyev, J.Bastin, F.Becker, E.Bouchez, P.A.Butler, J.F.C.Cocks, Y.Le Coz, K.Eskola, J.Gerl, K.Hauschild, K.Helariutta, R.-D.Herzberg, F.P.Hessberger, R.D.Humphreys, A.Hurstel, D.G.Jenkins, G.D.Jones, P.Jones, R.Julin, S.Juutinen, H.Kankaanpaa, A.Keenan, H.Kettunen, T.L.Khoo, W.Korten, P.Kuusiniemi, M.Leino, A.-P.Leppanen, M.Muikku, P.Nieminen, R.D.Page, T.Page, J.Pakarinen, P.Rahkila, P.Reiter, Ch.Schlegel, C.Scholey, Ch.Theisen, J.Uusitalo, K.Van de Vel, R.Wadsworth, H.-J.Wollersheim

In-beam spectroscopy at the RITU gas-filled recoil separator

doi: 10.1140/epja/i2002-10327-x
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2004HU11      Phys.Rev. C 69, 064324 (2004)

R.D.Humphreys, P.A.Butler, J.E.Bastin, P.T.Greenlees, N.J.Hammond, R.-D.Herzberg, D.G.Jenkins, G.D.Jones, H.Kankaanpaa, A.Keenan, H.Kettunen, T.Page, P.Rahkila, C.Scholey, J.Uusitalo, N.Amzal, P.M.T.Brew, K.Eskola, J.Gerl, K.Hauschild, K.Helariutta, F.-P.Hessberger, A.Hurstel, P.M.Jones, R.Julin, S.Juutinen, T.-L.Khoo, W.Korten, P.Kuusiniemi, Y.Le Coz, M.Leino, A.-P.Leppanen, M.Muikku, P.Nieminen, S.W.Odegard, J.Pakarinen, P.Reiter, G.Sletten, Ch.Theisen, H.-J.Wollersheim

In-beam electron spectroscopy of 226U and 254No

NUCLEAR REACTIONS 208Pb(22Ne, 4n), E=112 MeV; 208Pb(48Ca, 2n), E=219 MeV; measured E(ce), I(ce), (ce)(ce)-, (recoil)(ce)-coin. 226U, 254No deduced levels, J, π. SACRED spectrometer, mass separator, recoil-decay tagging.

doi: 10.1103/PhysRevC.69.064324
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2004HU15      Eur.Phys.J. A 21, 365 (2004)

A.Hurstel, Y.Le Coz, E.Bouchez, A.Chatillon, A.Gorgen, P.T.Greenlees, K.Hauschild, S.Juutinen, H.Kettunen, W.Korten, P.Nieminen, M.Rejmund, Ch.Theisen, J.Wilson, A.N.Andreyev, F.Becker, T.Enqvist, P.M.Jones, R.Julin, H.Kankaanpaa, A.Keenan, P.Kuusiniemi, M.Leino, A.-P.Leppanen, M.Muikku, J.Pakarinen, P.Rahkila, J.Uusitalo

Prolate deformation in the 187, 189Bi isotopes

NUCLEAR REACTIONS 109Ag(82Kr, 2n), E=337 MeV; 107,109Ag(83Kr, 3n), E=340 MeV; measured prompt and delayed Eγ, Iγ, γγ-, (recoil)γ-coin. 187,189Bi deduced levels, J, π, rotational bands, isomeric states T1/2. Recoil-decay tagging method.

doi: 10.1140/epja/i2004-10066-0
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2004KE06      Phys.Rev. C 69, 054323 (2004)

H.Kettunen, T.Enqvist, T.Grahn, P.T.Greenlees, P.Jones, R.Julin, S.Juutinen, A.Keenan, P.Kuusiniemi, M.Leino, A.-P.Leppanen, P.Nieminen, J.Pakarinen, P.Rahkila, J.Uusitalo

Decay studies of 170, 171Au, 171-173Hg, and 176Tl

RADIOACTIVITY 170,171Au, 176,177Tl(p); measured Ep, T1/2; deduced proton emission probabilities, spectroscopic factors. 171,172,173Hg, 170,171Au, 177Tl, 167,168,169,170Pt, 166,167Ir(α); measured Eα, T1/2; deduced hindrance factors.

NUCLEAR REACTIONS 96Ru(78Kr, xnyp), E=361-391 MeV; 102Pd(78Kr, xnyp), E=380-405 MeV; measured residual nucleus decay spectra, production σ; deduced evidence for 171Hg. Gas-filled recoil separator.

doi: 10.1103/PhysRevC.69.054323
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2003AN26      Eur.Phys.J. A 18, 39 (2003)

A.N.Andreyev, D.Ackermann, S.Antalic, H.J.Boardman, P.Cagarda, J.Gerl, F.P.Hessberger, S.Hofmann, M.Huyse, D.Karlgren, A.Keenan, H.Kettunen, A.Kleinbohl, B.Kindler, I.Kojouharov, A.Lavrentiev, C.D.O'Leary, M.Leino, B.Lommel, M.Matos, C.J.Moore, G.Munzenberg, R.D.Page, S.Reshitko, S.Saro, H.Schaffner, C.Schlegel, M.J.Taylor, K.Van de Vel, P.Van Duppen, L.Weissman, K.Heyde

α-decay spectroscopy of light odd-odd Bi isotopes - I: 188, 190Bi nuclei

RADIOACTIVITY 188,190Bi(α) [from 142Nd(50Cr, 3np), (52Cr, 3np), (52Cr, 5np)]; measured Eα, Eγ, (X-ray)α-, γα-coin, T1/2 following α-decay of ground and isomeric states. 184,186Tl deduced levels, J, π, configurations.

doi: 10.1140/epja/i2003-10050-2
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2003BA32      Eur.Phys.J. A 17, 1 (2003)

T.Back, B.Cederwall, K.Lagergren, R.Wyss, A.Johnson, P.Greenlees, D.Jenkins, P.Jones, D.T.Joss, R.Julin, S.Juutinen, A.Keenan, H.Kettunen, P.Kuusiniemi, M.Leino, A.-P.Leppanen, M.Muikku, P.Nieminen, J.Pakarinen, P.Rahkila, J.Uusitalo

Spectroscopy of the neutron-deficient nuclide 171Pt

NUCLEAR REACTIONS 96Ru(78Kr, n2p), E=363 MeV; measured Eγ, Iγ, γγ-, (recoil)γ-coin. 171Pt deduced levels, possible J, π. Jurosphere array, recoil-decay tagging.

doi: 10.1140/epja/i2002-10126-5
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2003BB21      Eur.Phys.J. A 16, 489 (2003)

T.Back, B.Cederwall, K.Lagergren, R.Wyss, A.Johnson, D.Karlgren, P.Greenlees, D.Jenkins, P.Jones, D.T.Joss, R.Julin, S.Juutinen, A.Keenan, H.Kettunen, P.Kuusiniemi, M.Leino, A.-P.Leppanen, M.Muikku, P.Nieminen, J.Pakarinen, P.Rahkila, J.Uusitalo

First observation of gamma-rays from the proton emitter 171Au

NUCLEAR REACTIONS 96Ru(78Kr, X)171Au, E=363 MeV; measured reaction products, Eγ, Iγ, Eα, Iα, Ep, Ip, γ-α- and γ-p-coin.; deduced γ-ray energies, level scheme on the top of 11/2- isomeric state.

RADIOACTIVITY 171Au(p), (α); measured decay products, Eγ, Iγ, Eα, Iα, Ep, Ip, γ-α- and γ-p-coin.; deduced 11/2- and 1/2+ states T1/2.

doi: 10.1140/epja/i2002-10108-7
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2003BU23      Acta Phys.Pol. B34, 2107 (2003)

P.A.Butler, R.D.Humphreys, P.T.Greenlees, R.-D.Herzberg, D.G.Jenkins, G.D.Jones, H.Kankaanpaa, H.Kettunen, P.Rahkila, C.Scholey, J.Uusitalo, N.Amzal, C.Andreoiu, A.Andreyev, D.Appelbe, J.E.Bastin, P.M.T.Brew, K.Eskola, S.J.Freeman, J.Gerl, N.J.Hammond, K.Hauschild, K.Helariutta, F.-P.Hessberger, A.Hurstel, P.J.C.Ikin, P.M.Jones, D.T.Joss, R.Julin, S.Juutinen, A.Keenan, T.-L.Khoo, W.Korten, P.Kuusiniemi, Y.Le Coz, M.Leino, A.-P.Leppanen, M.Muikku, P.Nieminen, S.W.Odegard, R.D.Page, T.Page, J.Pakarinen, P.Reiter, J.Simpson, G.Sletten, Ch.Theisen, B.J.Varley, H.-J.Wollersheim

High K bands in mid-supershell nuclei

NUCLEAR REACTIONS 208Pb(22Ne, 4n), E=111 MeV; 208Pb(48Ca, 2n), E=216 MeV; measured prompt and delayed E(ce), I(ce), (recoil)(electron)-coin. 254No deduced transitions, high-spin isomeric states. Mass separator, recoil-decay tagging.


2003JO06      Phys.Rev. C 68, 014303 (2003)

D.T.Joss, J.Simpson, E.S.Paul, R.D.Page, N.Amzal, D.E.Appelbe, T.Back, B.Cederwall, J.F.C.Cocks, D.M.Cullen, P.T.Greenlees, K.Helariutta, P.M.Jones, R.Julin, S.Juutinen, H.Kankaanpaa, A.Keenan, H.Kettunen, S.L.King, P.Kuusiniemi, M.Leino, M.Muikku, A.Savelius, J.Uusitalo

Strongly coupled bands in the neutron-deficient nucleus 167Re

NUCLEAR REACTIONS 112Sn(58Ni, 3p), E=265 MeV; measured Eγ, Iγ, γγ-, (recoil)γ-coin. 167Re deduced high-spin levels, J, π, B(M1)/B(E2), configurations. Recoil-decay tagging.

doi: 10.1103/PhysRevC.68.014303
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2003KE08      Eur.Phys.J. A 17, 537 (2003)

H.Kettunen, T.Enqvist, T.Grahn, P.T.Greenlees, P.Jones, R.Julin, S.Juutinen, A.Keenan, P.Kuusiniemi, M.Leino, A.-P.Leppanen, P.Nieminen, J.Pakarinen, P.Rahkila, J.Uusitalo

Alpha-decay studies of the new isotopes 191At and 193At

NUCLEAR REACTIONS 141Pr(54Fe, 4n), (56Fe, 4n), E ≈ 248-272 MeV; measured excitation functions. Recoil-decay tagging.

RADIOACTIVITY 191,193At, 187,189Bi(α) [from 141Pr(54Fe, 4n), (56Fe, 4n) and subsequent decay]; measured Eα, T1/2 for ground and excited states; deduced hindrance factors. 191,193At, 187,189Bi deduced levels, J, π, configurations.

doi: 10.1140/epja/i2002-10162-1
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2003VA05      Eur.Phys.J. A 17, 167 (2003)

K.Van de Vel, A.N.Andreyev, R.D.Page, H.Kettunen, P.T.Greenlees, P.Jones, R.Julin, S.Juutinen, H.Kankaanpaa, A.Keenan, P.Kuusiniemi, M.Leino, M.Muikku, P.Nieminen, P.Rahkila, J.Uusitalo, K.Eskola, A.Hurstel, M.Huyse, Y.Le Coz, M.B.Smith, P.Van Duppen, R.Wyss

In-beam γ-ray spectroscopy of 190Po: First observation of a low-lying prolate band in Po isotopes

NUCLEAR REACTIONS 142Nd(52Cr, 4n), E=255 MeV; measured Eγ, Iγ, (recoil)γ-coin. 190Po deduced levels, J, π, configurations, deformation. Jurosphere array, recoil-decay tagging. Level systematics in neighboring nuclides discussed.

RADIOACTIVITY 187,188Pb, 188,190,191,193Bi, 190,191,192Po(α) [from 142Nd(52Cr, xnyp)]; measured Eα. Mass separator.

doi: 10.1140/epja/i2003-10002-x
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2002AP03      Phys.Rev. C66, 014309 (2002)

D.E.Appelbe, J.Simpson, M.Muikku, H.J.Boardman, A.Melarangi, R.D.Page, P.T.Greenlees, P.M.Jones, R.Julin, S.Juutinen, A.Keenan, H.Kettunen, P.Kuusiniemi, M.Leino, P.Nieminen, J.Pakarinen, P.Rahkila, J.Uusitalo, D.T.Joss

First Observation of Excited States in the Very Neutron Deficient Nucleus 76165Os and the Yrast Structure of 76166Os

NUCLEAR REACTIONS 106Cd(64Zn, 2n2p), (64Zn, 3n2p), E=334 MeV; measured Eγ, Iγ, γγ-, (recoil)γ-coin. 166Os deduced levels, J, π. 165Os deduced transitions. Jurosphere array, recoil decay tagging. Level systematics in neighboring nuclides discussed.

doi: 10.1103/PhysRevC.66.014309
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2002BU28      Phys.Rev.Lett. 89, 202501 (2002)

P.A.Butler, R.D.Humphreys, P.T.Greenlees, R.-D.Herzberg, D.G.Jenkins, G.D.Jones, H.Kankaanpaa, H.Kettunen, P.Rahkila, C.Scholey, J.Uusitalo, N.Amzal, J.E.Bastin, P.M.T.Brew, K.Eskola, J.Gerl, N.J.Hammond, K.Hauschild, K.Helariutta, F.-P.Hessberger, A.Hurstel, P.M.Jones, R.Julin, S.Juutinen, A.Keenan, T.-L.Khoo, W.Korten, P.Kuusiniemi, Y.Le Coz, M.Leino, A.-P.Leppanen, M.Muikku, P.Nieminen, S.W.Odegard, T.Page, J.Pakarinen, P.Reiter, G.Sletten, Ch.Theisen, H.-J.Wollersheim

Conversion Electron Cascades in 254102No

NUCLEAR REACTIONS 208Pb(22Ne, 4n), E=111 MeV; 208Pb(48Ca, 2n), E=219 MeV; measured E(ce), I(ce), (recoil)(ce)-coin. 254No deduced magnetic dipole transitions.

doi: 10.1103/PhysRevLett.89.202501
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2002CU05      Phys.Rev. C66, 034308 (2002)

D.M.Cullen, L.K.Pattison, R.S.Chakrawarthy, D.Dobson, J.L.Durell, S.J.Freeman, D.T.Scholes, C.Scholey, E.S.Paul, P.T.W.Choy, P.T.Greenlees, P.M.Jones, R.Julin, S.Juutinen, A.Keenan, H.Kettunen, P.Kuusiniemi, M.Leino, A.-P.Leppanen, P.Nieminen, J.Pakarinen, P.Rahkila, J.Uusitalo, M.A.Bentley, D.T.Joss

Identification of Excited States in Doubly Odd 63140Eu77 by Recoil-Isomer Tagging

NUCLEAR REACTIONS 107Ag(36Ar, n2p), E=152, 181 MeV; measured prompt and delayed Eγ, Iγ, γγ-, (recoil)γ-coin; deduced production σ. 140Eu deduced high-spin levels, possible J, π, configurations, isomer T1/2. Jurosphere II array, recoil-isomer tagging.

doi: 10.1103/PhysRevC.66.034308
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2002DO19      Phys.Rev. C 66, 064321 (2002)

D.J.Dobson, S.J.Freeman, P.T.Greenlees, A.N.Qadir, S.Juutinen, J.L.Durell, T.Enqvist, P.Jones, R.Julin, A.Keenan, H.Kettunen, P.Kuusiniemi, M.Leino, P.Nieminen, P.Rahkila, S.D.Robinson, J.Uusitalo, B.J.Varley

Low-lying structure of light radon isotopes

NUCLEAR REACTIONS 168Er(36Ar, 4n), E=175 MeV; 166Er(40Ar, 4n), E=182 MeV; 168Er(40Ar, 4n), E=177 MeV; measured Eγ, Iγ, γγ-, (recoil)γ-coin. 200,202,204Rn deduced levels, J, π, configurations. Jurosphere array, mass separator, recoil-decay tagging.

doi: 10.1103/PhysRevC.66.064321
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2002HA30      Phys.Rev. C65, 064315 (2002)

N.J.Hammond, G.D.Jones, P.A.Butler, R.D.Humphreys, P.T.Greenlees, P.M.Jones, R.Julin, S.Juutinen, A.Keenan, H.Kettunen, P.Kuusiniemi, M.Leino, M.Muikku, P.Nieminen, P.Rahkila, J.Uusitalo, S.V.Khlebnikov

Observation of K = 1/2 Octupole Deformed Bands in 227Th

NUCLEAR REACTIONS 226Ra(α, 3n), E=33 MeV; measured Eγ, Iγ, γγ-coin. 227Th deduced levels, J, π, configurations, B(E1)/B(E2), octupole correlations. Jurosphere array.

doi: 10.1103/PhysRevC.65.064315
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2002HU14      Eur.Phys.J. A 15, 329 (2002)

A.Hurstel, M.Rejmund, E.Bouchez, P.T.Greenlees, K.Hauschild, S.Juutinen, W.Korten, Y.Le Coz, P.Nieminen, Ch.Theisen, A.N.Andreyev, F.Becker, T.Enqvist, P.M.Jones, R.Julin, H.Kankaanpaa, A.Keenan, P.Kuusiniemi, M.Leino, A-P.Leppanen, M.Muikku, J.Pakarinen, P.Rahkila, J.Uusitalo

Isomeric states in proton-unbound 187, 189Bi isotopes

NUCLEAR REACTIONS 109Ag(82Kr, 2n), E=337 MeV; 109Ag(83Kr, 3n), E=340 MeV; 107Ag(82Kr, 2n), E=339 MeV; measured prompt and delayed Eγ, Iγ, (recoil)γ-coin. 187,189Bi deduced isomeric states J, π, T1/2. Jurosphere array, recoil-decay tagging technique. Systematics of isomeric states in neighboring nuclides discussed.

doi: 10.1140/epja/i2002-10032-x
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2002JO20      Phys.Rev. C 66, 054311 (2002)

D.T.Joss, J.Simpson, R.D.Page, S.L.King, N.Amzal, D.E.Appelbe, T.Back, M.A.Bentley, B.Cederwall, J.F.C.Cocks, D.M.Cullen, P.T.Greenlees, K.Helariutta, P.M.Jones, R.Julin, S.Juutinen, H.Kankaanpaa, A.Keenan, H.Kettunen, P.Kuusiniemi, M.Leino, M.Muikku, A.Savelius, J.Uusitalo, D.D.Warner, S.J.Williams, R.Wyss

Yrast spectroscopy in the neutron-deficient nucleus 169Os

NUCLEAR REACTIONS 112Sn(60Ni, n2p), E=265 MeV; measured Eγ, Iγ, γγ-, (recoil)γ-coin. 169Os deduced high-spin levels, J, π, configurations. Jurosphere array, recoil-decay tagging. Comparisons with neighboring nuclides and with model predictions.

doi: 10.1103/PhysRevC.66.054311
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2002JU12      Eur.Phys.J. A 15, 189 (2002)

R.Julin, P.T.Greenlees, K.Helariutta, P.Jones, S.Juutinen, A.-P.Leppanen, H.Kankaanpaa, A.Keenan, H.Kettunen, P.Kuusiniemi, M.Leino, M.Muikku, P.Nieminen, J.Pakarinen, P.Rahkila, J.Uusitalo, D.T.Joss, S.J.Williams, D.G.Jenkins, N.-S.Kelsall, R.Wadsworth, K.Hauschild, A.Hurstel, W.Korten, Y.Le Coz, A.N.Andreyev, P.Van Duppen, M.Huyse, K.Van de Vel, C.J.Moore, C.D.O'Leary, R.D.Page, M.J.Taylor, W.Reviol, M.B.Smith

In-beam studies of very neutron-deficient heavy nuclei

NUCLEAR REACTIONS 144Sm(36Ar, 4n), (42Ca, 4n), 112Sn(64Zn, 2n), 171Yb(28Si, 5n), 142Nd(52Cr, 4n), E not given; measured Eγ, Iγ, (recoil)γ-coin. 182Pb, 190Po deduced transitions. Recoil-decay tagging.

doi: 10.1140/epja/i2001-10252-6
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2001AM09      Acta Phys.Pol. B32, 2519 (2001)

N.Amzal, P.A.Butler, P.T.Greenlees, R.-D.Herzberg, R.D.Humphreys, H.Kankaanpaa, J.Bastin, F.Becker, P.M.Brew, J.F.C.Cocks, R.A.Cunningham, T.Czosnyka, K.Eskola, J.Gerl, N.J.Hammond, K.Hauschild, P.Heikinen, K.Helariutta, F.-P.Hessberger, A.Hurstel, J.Iwanicki, G.D.Jones, P.M.Jones, R.Julin, S.Juutinen, A.Keenan, H.Kettunen, S.Khlebnikov, T.-L.Khoo, W.Korten, P.Kuusiniemi, Y.LeCoz, M.Leino, M.Muikku, P.Nieminen, T.Page, P.Rahkila, P.Reiter, C.S.Scholey, G.Sletten, O.Stezowski, C.Theisen, J.Uusitalo, H.-J.Wollersheim

The Structure of Heavy Octupole and Superheavy Quadrupole Deformed Nuclei

NUCLEAR REACTIONS 226Ra(40Ar, 40Ar'), E=60 MeV; measured Eγ, Iγ, (particle)γ-coin following Coulomb excitation. 208Pb(48Ca, 2n), E=216 MeV; measured E(ce), I(ce), (recoil)(ce)-coin. 254No deduced transitions.


2001AN07      Nucl.Phys. A682, 482c (2001)

A.N.Andreyev, M.Huyse, P.Van Duppen, L.Weissman, D.Ackermann, J.Gerl, F.P.Hessberger, S.Hofmann, A.Kleinbohl, G.Munzenberg, S.Reshitko, C.Schlegel, H.Schaffner, P.Cagarda, M.Matos, S.Saro, A.Keenan, C.J.Moore, C.D.O'Leary, R.D.Page, M.J.Taylor, H.Kettunen, M.Leino, A.Lavrentiev, R.Wyss, K.Heyde

The Discovery of a Prolate-Spherical Shape Triple of Spin 0+ States in the Atomic Nucleus 186Pb

RADIOACTIVITY 190Po(α) [from 142Nd(52Cr, 4n)]; measured Eα, Iα, (ce)α-coin; deduced reduced α-decay widths, hindrance factors. 186Po deduced levels, J, π, shape coexistence features.

doi: 10.1016/S0375-9474(00)00676-X
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2001AN11      Eur.Phys.J. A 10, 129 (2001)

A.N.Andreyev, D.Ackermann, P.Cagarda, J.Gerl, F.P.Hessberger, S.Hofmann, M.Huyse, A.Keenan, H.Kettunen, A.Kleinbohl, A.Lavrentiev, M.Leino, B.Lommel, M.Matos, G.Munzenberg, C.J.Moore, C.D.O'Leary, R.D.Page, S.Reshitko, S.Saro, C.Schlegel, H.Schaffner, M.J.Taylor, P.Van Duppen, L.Weissman, R.Wyss

New Microsecond Isomers in 189, 190Bi

NUCLEAR REACTIONS 142Nd(52Cr, 3np), (52Cr, 4np), E=239-307 MeV; measured Eγ, Iγ, γγ-, (recoil)γ-, (X-ray)γ-coin. 189,190Bi deduced isomer T1/2 lower limits, level configurations. Recoil-decay tagging. Level systematics in neigboring isotopes discussed.

RADIOACTIVITY 189,190Bi(α) [from 142Nd(52Cr, xnp)]; measured Eα, Iα.

doi: 10.1007/s100500170123
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2001BU11      Acta Phys.Pol. B32, 619 (2001)

P.A.Butler, A.J.Chewter, H.Kankaanpaa, R.D.Herzberg, F.Becker, J.F.C.Cocks, O.Dorvaux, K.Eskola, J.Gerl, P.T.Greenlees, N.Hammond, K.Helariutta, F.P.Hessberger, M.Houry, R.D.Humphreys, A.Hurstel, G.D.Jones, R.Julin, S.Juutinen, A.Keenan, H.Kettunen, T.L.Khoo, W.Korten, P.Kuusiniemi, Y.Le Coz, M.Leino, R.Lucas, M.Muikku, P.Nieminen, R.D.Page, T.Page, P.Rahkila, P.Reiter, A.Savelius, Ch.Schlegel, C.Theisen, W.H.Trzaska, J.Uusitalo, H.J.Wollersheim

Towards In-Beam Spectroscopy of the Heaviest Elements

NUCLEAR REACTIONS 206,208Pb(48Ca, 2n), E ≈ 215 MeV; measured Eγ, Iγ, γγ-, (recoil)γ-coin. 252,254No deduced rotational bands, transitions B(E2). 124Sn(48Ca, xn)165Yb/166Yb/167Yb, E=215 MeV; measured E(ce), I(ce), (recoil)(ce)-coin. Gas-filled separator, recoil-decay tagging.


2001JO11      Nucl.Phys. A689, 631 (2001)

D.T.Joss, S.L.King, R.D.Page, J.Simpson, A.Keenan, N.Amzal, T.Back, M.A.Bentley, B.Cederwall, J.F.C.Cocks, D.M.Cullen, P.T.Greenlees, K.Helariutta, P.M.Jones, R.Julin, S.Juutinen, H.Kankaanpaa, H.Kettunen, P.Kuusiniemi, M.Leino, M.Muikku, A.Savelius, J.Uusitalo, S.J.Williams

Identification of Excited States in 167Os and 168Os: Shape coexistence at extreme neutron deficiency

NUCLEAR REACTIONS 112Sn(58Ni, 2p), (58Ni, n2p), E=266 MeV; measured Eγ, Iγ, (recoil)γ-, γγ-coin. 167,168Os deduced high-spin levels, J, π, configurations, shape coexistence. Jurosphere spectrometer, gas-filled separator, cranked mean-field calculations.

doi: 10.1016/S0375-9474(00)00692-8
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2001JU03      Acta Phys.Pol. B32, 645 (2001)

R.Julin, P.T.Greenlees, K.Helariutta, P.Jones, S.Juutinen, H.Kankaanpaa, A.Keenan, H.Kettunen, P.Kuusiniemi, M.Leino, M.Muikku, P.Nieminen, P.Rahkila, J.Uusitalo, D.T.Joss, S.J.Williams, N.-S.Kelsall, R.Wadsworth, K.Hauschild, A.Hurstel, W.Korten, Y.LeCoz, A.N.Andreyev, K.Van de Vel, C.J.Moore, C.D.O'Leary, R.D.Page, M.J.Taylor, W.Reviol, M.B.Smith

Probing Structures of Exotic Heavy Nuclei

NUCLEAR REACTIONS 112Sn(64Zn, 2n), E not given; 142Nd(52Cr, 4n), E not given; measured Eγ, Iγ, (recoil)γ-coin. 174Hg, 190Po deduced levels, J, π. Recoil-decay tagging. Level systematics in neighboring nuclides discussed.

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2001KE09      Phys.Rev. C63, 064309 (2001)

A.Keenan, R.D.Page, J.Simpson, N.Amzal, J.F.C.Cocks, D.M.Cullen, P.T.Greenlees, S.L.King, K.Helariutta, P.Jones, D.T.Joss, R.Julin, S.Juutinen, H.Kankaanpaa, P.Kuusiniemi, M.Leino, M.Muikku, A.Savelius, M.B.Smith, M.J.Taylor

First Observation of Excited States in the Neutron Deficient N = 86 Isotones 159Ta and 160W

NUCLEAR REACTIONS 106Cd(58Ni, 2n2p), (58Ni, 2n3p), E=286, 291, 298 MeV; measured Eγ, Iγ, (recoil)γ-, γγ-coin. 159Ta, 160W deduced levels, J, π, configurations. Comparisons with neighboring nuclides. Jurosphere array, mass separation, recoil-decay tagging.

doi: 10.1103/PhysRevC.63.064309
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2001KU07      Acta Phys.Pol. B32, 1009 (2001)

P.Kuusiniemi, J.F.C.Cocks, K.Eskola, P.T.Greenlees, K.Helariutta, P.Jones, R.Julin, S.Juutinen, H.Kankaanpaa, A.Keenan, H.Kettunen, M.Leino, M.Muikku, P.Nieminen, P.Rahkila, J.Uusitalo

Studies of 225, 226U Alpha Decay Chains

RADIOACTIVITY 225,226U, 221,222Th, 218Ra, 213Rn(α) [from 208Pb(22Ne, X), (18O, X) and subsequent decays]; measured Eα, Iα, T1/2. Comparisons with previous results. Mass-separated sources.


2001RA09      Acta Phys.Pol. B32, 773 (2001)

P.Rahkila, T.Grahn, K.Eskola, J.Gerl, P.T.Greenlees, P.Jones, D.T.Joss, R.Julin, S.Juutinen, H.Kankaanpaa, A.Keenan, H.Kettunen, I.Kojouharov, P.Kuusiniemi, M.Leino, A.Melarangi, C.J.Moore, M.Muikku, P.Nieminen, R.D.Page, C.Scholey, J.Uusitalo

Characteristics of Segmented Super Clover Detector in Close Geometry Decay Measurements

NUCLEAR REACTIONS 150Sm(42Ca, 4n), E not given; measured Eγ, Iγ, (recoil)γ-, γγ-coin.

RADIOACTIVITY 188Pb(IT) [from 150Sm(42Ca, 4n)]; measured Eγ, Iγ, γγ-coin.


2000AN14      Nature(London) 405, 430 (2000)

A.N.Andreyev, M.Huyse, P.Van Duppen, L.Weissman, D.Ackermann, J.Gerl, F.P.Hessberger, S.Hofmann, A.Kleinbohl, G.Munzenberg, S.Reshitko, C.Schlegel, H.Schaffner, P.Cagarda, M.Matos, S.Saro, A.Keenan, C.Moore, C.D.O'Leary, R.D.Page, M.Taylor, H.Kettunen, M.Leino, A.Lavrentiev, R.Wyss, K.Heyde

A Triplet of Differently Shaped Spin-Zero States in the Atomic Nucleus 186Pb

RADIOACTIVITY 190Po(α) [from 142Nd(52Cr, 4n)]; measured Eα, Iα, (ce)α-coin; deduced reduced α-decay widths. 186Pb deduced levels, J, π, spherical-oblate-prolate deformation triplet. Comparison with model predictions.

doi: 10.1038/35013012
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2000KI33      Phys.Rev. C62, 067301 (2000)

S.L.King, R.D.Page, J.Simpson, A.Keenan, N.Amzal, A.J.Chewter, J.F.C.Cocks, D.M.Cullen, O.Dorvaux, P.T.Greenlees, K.Helariutta, P.Jones, D.T.Joss, R.Julin, S.Juutinen, H.Kankaanpaa, H.Kettunen, P.Kuusiniemi, M.Leino, R.C.Lemmon, M.Muikku, P.Nieminen, A.Savelius, S.L.Shepherd, M.B.Smith, M.J.Taylor, J.Uusitalo

First Observation of Excited States in the Neutron Deficient Nuclei 164Os and 166Os

NUCLEAR REACTIONS 106Cd(63Cu, 2np), E=292 MeV; 112Sn(58Ni, 2n2p), E=286 MeV; 106Cd(60Ni, 2n), E=257 MeV; measured Eγ, Iγ, (recoil)γ-coin. 164,166Os deduced levels, possible J, π, configurations. Recoil-decay tagging. Level systematics in neighboring nuclides discussed.

doi: 10.1103/PhysRevC.62.067301
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1999AN52      Eur.Phys.J. A 6, 381 (1999)

A.N.Andreyev, D.Ackermann, P.Cagarda, J.Gerl, F.Hessberger, S.Hofmann, M.Huyse, A.Keenan, H.Kettunen, A.Kleinbohl, A.Lavrentiev, M.Leino, B.Lommel, M.Matos, G.Munzenberg, C.Moore, C.D.O'Leary, R.D.Page, S.Reshitko, S.Saro, C.Schlegel, H.Schaffner, M.Taylor, P.Van Duppen, L.Weissman, R.Wyss

Alpha Decay of the New Isotopes 188, 189Po

NUCLEAR REACTIONS 142Nd(52Cr, 5n), (52Cr, 6n), E=239-307 MeV; measured Eγ, Iγ, αγ-coin following residual decay; deduced evidence for 188,189Po.

RADIOACTIVITY 188,189Po(α) [from 142Nd(52Cr, xn)]; measured Eα, Iα, αγ-coin; deduced decay branching ratios. 184,185Pb deduced levels, branching ratios.

doi: 10.1007/s100500050359
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1999LE36      Acta Phys.Pol. B30, 1245 (1999)

M.Leino, R.G.Allatt, A.N.Andreyev, J.F.C.Cocks, O.Dorvaux, T.Enqvist, K.Eskola, K.Helariutta, M.Huyse, P.M.Jones, R.Julin, S.Juutinen, H.Kankaanpaa, A.Keenan, H.Kettunen, P.Kuusiniemi, M.Muikku, R.D.Page, P.Rahkila, A.Savelius, W.H.Trzaska, J.Uusitalo, P.Van Duppen

Decay and In-Beam Studies of Neutron-Deficient Po and Ra Isotopes at JYFL


1998CE10      Phys.Lett. 443B, 69 (1998)

B.Cederwall, T.Back, R.Bark, S.Tormanen, S.Odegard, S.L.King, J.Simpson, R.D.Page, N.Amzal, D.M.Cullen, P.T.Greenlees, A.Keenan, R.Lemmon, J.F.C.Cocks, K.Helariutta, P.M.Jones, R.Julin, S.Juutinen, H.Kettunen, H.Kankaanpaa, P.Kuusiniemi, M.Leino, M.Muikku, P.Rahkila, A.Savelius, J.Uusitalo, P.Magierski, R.Wyss

Collective Rotational - Vibrational Transition in the Very Neutron-Deficient Nuclei 171, 172Pt

NUCLEAR REACTIONS 116Sn(58Ni, 2n), (58Ni, 3n), E=260, 267 MeV; 112Sn(63Cu, 2np), E=292 MeV; measured Eγ, Iγ, γγ-, (recoil)γ-coin. 171,172Pt deduced transitions, levels, possible J, π. Comparison with TRS, QRPA calculations. Recoil-decay tagging technique, Jurosphere array.

doi: 10.1016/S0370-2693(98)01334-3
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1998CU03      Phys.Rev. C58, 846 (1998)

D.M.Cullen, N.Amzal, A.J.Boston, P.A.Butler, A.Keenan, E.S.Paul, H.C.Scraggs, A.M.Bruce, C.M.Parry, J.F.C.Cocks, K.Helariutta, P.M.Jones, R.Julin, S.Juutinen, H.Kankaanpaa, H.Kettunen, P.Kuusiniemi, M.Leino, M.Muikku, A.Savelius

Identification of the Kπ = 8- Rotational Band in 138Gd

NUCLEAR REACTIONS 106Cd(36Ar, 2n2p), E=180 MeV; measured Eγ, Iγ, (recoil)γ(t). 138Gd deduced high-spin levels, J, π, rotational band, configurations, g(k)-g(r) factors.

doi: 10.1103/PhysRevC.58.846
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1998KI20      Phys.Lett. 443B, 82 (1998)

S.L.King, J.Simpson, R.D.Page, N.Amzal, T.Back, B.Cederwall, J.F.C.Cocks, D.M.Cullen, P.T.Greenlees, M.K.Harder, K.Helariutta, P.Jones, R.Julin, S.Juutinen, H.Kankaanpaa, A.Keenan, H.Kettunen, P.Kuusiniemi, M.Leino, R.Lemmon, M.Muikku, A.Savelius, J.Uusitalo, P.Van Isacker

First Observation of Excited States in the Neutron Deficient Nuclei 168Pt and 170Pt

NUCLEAR REACTIONS 112Sn(63Cu, 4np), E=338 MeV; 112Sn(60Ni, 2n), E=266 MeV; 112Sn(58Ni, 2n), E=265 MeV; measured Eγ, Iγ, γγ-, (recoil)γ-coin. 170Pt deduced levels, J, π. 168Pt deduced transitions. Recoil-decay tagging technique, Jurosphere array. Systematics of Pt levels discussed.

doi: 10.1016/S0370-2693(98)01333-1
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1997UU01      Z.Phys. A358, 375 (1997)

J.Uusitalo, M.Leino, R.G.Allatt, T.Enqvist, K.Eskola, P.T.Greenlees, S.Hurskanen, A.Keenan, H.Kettunen, P.Kuusiniemi, R.D.Page, W.H.Trzaska

Alpha Decay of the New Isotope 174Hg

RADIOACTIVITY 174Hg(α) [from 144Sm(36Ar, 6n), E=180-230 MeV]; measured Eα, Iα, T1/2, (α)(α)-coin; deduced 174Hg decay. 170Pt(α) [from 174Pt(α-decay)]; 175Hg(α) [from 144Sm(36Ar, 5n), E=180-230 MeV]; 171Pt(α) [from 175Hg(α-decay)]; measured Eα, T1/2.

NUCLEAR REACTIONS, ICPND 144Sm(36Ar, 6n), (36Ar, 5n), (36Ar, 4n), (36Ar, 3n), E=180-230 MeV; measured Eα, Iα following recoil separation; deduced residuals production σ. Gas-filled recoil separator.

doi: 10.1007/s002180050342
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