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The University of Tennessee

Department of Physics and Astronomy

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Dr. Iain G. Darby

220 Ayres Hall

1403 Circle Drive

(865) 974 7803 (UT)

(865) 576 8763 (JIHIR)

idarby@utk.edu

Joint Institute for Heavy Ion Research
Holifield Radioactive Ion Beam Facility
P.O. Box 2008
Building 6000 MS 6-374, ORNL
Oak Ridge, Tennessee 37831-6374

Research Activities

My research is focussed on the structure of very neutron deficient nuclei at or near the proton drip-line. Using a variety of spectroscopic methods discrete states in these nuclei are identified and assigned. The relative position of these states across a chain of nuclei and, ultimately, the whole nuclear chart will help us develop a better understanding of atomic matter.

Selected Publications

α decay of 159Re and proton emission from 155Ta

Phys. Rev. C 75, 061302 (2007)

R.D. Page, L. Bianco, I.G. Darby et al.

 

Probing the limit of nuclear existence: Proton emission from 159Re

Phys. Lett. B 641, 34 (2006)

D.T. Joss, I.G. Darby, R.D. Page, J. Uusitalo et al..

 

Discovery of 109Xe and 105Te: Superallowed α Decay near Doubly Magic 100Sn

Phys. Rev. Lett. 97, 082501 (2006)

S.N.Liddick, R.Grzywacz, C.Mazzocchi, R.D.Page, K.Rykaczewski, J.C.Batchelder, C.R.Bingham, I.G.Darby et al.

 

 

2008

 

Lifetimes of intruder states in 186Pb, 188Pb and 194Po

Nuclear Physics A, In Press.

T. Grahn, A. Dewald, O. Möller, R. Julin, C.W. Beausang, S. Christen, I.G. Darby, S. Eeckhaudt, P.T. Greenlees, A. Görgen, K. Helariutta, J. Jolie, P. Jones, S. Juutinen, H. Kettunen, T. Kröll, R. Krücken, Y. Le Coz, M. Leino, A.-P. Leppänen, P. Maierbeck, D.A. Meyer, B. Melon, P. Nieminen, M. Nyman, R.D. Page, J. Pakarinen, P. Petkov, P. Rahkila, B. Saha, M. Sandzelius, J. Sarén, C. Scholey, J. Uusitalo, M. Bender and P.-H. Heenen.

 

Direct evidence for prolate structures in light Pb isotopes from in-beam γ-ray spectroscopy of 185Pb

Phys. Rev. C Rapid Communication, submitted.

J. Pakarinen, A.N. Andreyev, R. Julin, S. Antalic, L. Bianco, I.G. Darby, S. Eeckhaudt, T. Grahn, P.T. Greenlees, D.G. Jenkins, P. Jones, P. Joshi, S. Juutinen, H. Kettunen, M. Leino, A.-P. Leppänen, P. Nieminen, M. Nyman, R.D. Page, J. Perkowski, P.M. Raddon, P. Rahkila, D. Rostron, J. Saren, C. Scholey, B. Streicher, J. Sorri, J. Uusitalo, K. Van de Vel, M. Venhart, D. Wiseman and R. Wadsworth.

 

2007

 

The New Isotopes in Po-Rn Region

Acta Phys.Pol. B38, 1557 (2007)

S.Antalic, A.N.Andreyev, D.Ackermann, L.Bianco, D.Cullen, I.Darby, S.Franchoo, S.Heinz, F.P.Hessberger, S.Hofmann, M.Huyse, B.Kindler, I.Kojouharov, A.-P.Leppanen, S.R.Lesher, B.Lommel, R.Mann, G.Munzenberg, K.Nishio, R.D.Page, J.Pakarinen, J.J.Ressler, S.Saro, B.Streicher, B.Sulignano, J.Thomson, P.Van Duppen, M.Venhart, D.Wiseman and R.Wyss.

 

First observation of beta-delayed three-proton emission in 45Fe

Phys.Rev. C 76, 041304 (2007)

K.Miernik, W.Dominik, Z.Janas, M.Pfutzner, C.R.Bingham, H.Czyrkowski, M.Cwiok, I.G.Darby, R.Dabrowski, T.Ginter, R.Grzywacz, M.Karny, A.Korgul, W.Kusmierz, S.N.Liddick, M.Rajabali, K.Rykaczewski and A.Stolz.

 

Two-Proton Correlations in the Decay of 45Fe

Phys.Rev.Lett. 99, 192501 (2007)

K.Miernik, W.Dominik, Z.Janas, M.Pfutzner, C.R.Bingham, H.Czyrkowski, M.Cwiok, I.G.Darby, R.Dabrowski, T.Ginter, R.Grzywacz, M.Karny, A.Korgul, W.Kusmierz, S.N.Liddick, M.Rajabali, K.Rykaczewski and A.Stolz.

 

Investigation of nuclear collectivity in the neutron mid-shell nucleus 186Pb

Phys. Rev. C 75, 014302 (2007)

J.Pakarinen, V.Hellemans, R.Julin, S.Juutinen, K.Heyde, P.-H.Heenen, M.Bender, I.G.Darby, S.Eeckhaudt, T.Enqvist, T.Grahn, P.T.Greenlees, F.Johnston-Theasby, P.Jones, H.Kettunen, M.Leino, A.-P.Leppanen, P.Nieminen, M.Nyman, R.D.Page, P.M.Raddon, P.Rahkila, C.Scholey, J.Uusitalo and R.Wadsworth.

 

α decay of 159Re and proton emission from 155Ta

Phys. Rev. C 75, 061302 (2007)

R.D.Page, L.Bianco, I.G.Darby, J.Uusitalo, D.T.Joss, T.Grahn, R.-D.Herzberg, J.Pakarinen, J.Thomson, S.Eeckhaudt, P.T.Greenlees, P.M.Jones, R.Julin, S.Juutinen, S.Ketelhut, M.Leino, A.-P.Leppanen, M.Nyman, P.Rahkila, J.Saren, C.Scholey, A.Steer, M.B.Gomez Hornillos, J.S.Al-Khalili, A.J.Cannon, P.D.Stevenson, S.Erturk, B.Gall, B.Hadinia, M.Venhart and J.Simpson.

 

Nuclear levels in proton-unbound 109I: Relative single-particle energies beyond the proton drip line

Phys.Rev. C 76, 054301 (2007)

M.Petri, E.S.Paul, B.Cederwall, I.G.Darby, M.R.Dimmock, S.Eeckhaudt, E.Ganioglu, T.Grahn, P.T.Greenlees, B.Hadinia, P.Jones, D.T.Joss, R.Julin, S.Juutinen, S.Ketelhut, A.Khaplanov, M.Leino, L.Nelson, M.Nyman, R.D.Page, P.Rahkila, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, J.Uusitalo and R.Wadsworth.

 

Identification of Excited States in the Tz=1 Nucleus 110Xe: Evidence for Enhanced Collectivity near the N=Z=50 Double Shell Closure

Phys. Rev. Lett. 99, 022501 (2007)

M.Sandzelius, B.Hadinia, B.Cederwall, K.Andgren, E.Ganioglu, I.G.Darby, M.R.Dimmock, S.Eeckhaudt, T.Grahn, P.T.Greenlees, E.Ideguchi, P.M.Jones, D.T.Joss, R.Julin, S.Juutinen, A.Khaplanov, M.Leino, L.Nelson, M.Niikura, M.Nyman, R.D.Page, J.Pakarinen, E.S.Paul, M.Petri, P.Rahkila, J.Saren, C.Scholey, J.Sorri, J.Uusitalo, R.Wadsworth and R.Wyss.

 

In-beam gamma-ray spectroscopy of 190, 197Po

Eur.Phys.J. A 34, 275 (2007)

D.R.Wiseman, A.N.Andreyev, R.D.Page, M.B.Smith, I.G.Darby, S.Eeckhaudt, T.Grahn, P.T.Greenlees, P.Jones, R.Julin, S.Juutinen, H.Kettunen, M.Leino, A.-P.Leppanen, M.Nyman, J.Pakarinen, P.Rahkila, M.Sandzelius, J.Saren, C.Scholey and J.Uusitalo.

 

2006

 

α decay of the new isotopes 193, 194Rn

Phys. Rev. C 74, 064303 (2006)

A.N.Andreyev, S.Antalic, M.Huyse, P.Van Duppen, D.Ackermann, L.Bianco, D.M.Cullen, I.G.Darby, S.Franchoo, S.Heinz, F.P.Hessberger, S.Hofmann, I.Kojouharov, B.Kindler, A.-P.Leppanen, B.Lommel, R.Mann, G.Munzenberg, J.Pakarinen, R.D.Page, J.J.Ressler, S.Saro, B.Streicher, B.Sulignano, J.Thomson and R.Wyss.

 

Collectivity and configuration mixing in 186,188Pb and 194Po

Phys. Rev. Lett. 97, 062501 (2006)

T.Grahn, A.Dewald, O.Moller, R.Julin, C.W.Beausang, S.Christen, I.G.Darby, S.Eeckhaudt, P.T.Greenlees, A.Gorgen, K.Helariutta, J.Jolie, P.Jones, S.Juutinen, H.Kettunen, T.Kroll, R.Krucken, Y.Le Coz, M.Leino, A.-P.Leppanen, P.Maierbeck, D.A.Meyer, B.Melon, P.Nieminen, M.Nyman, R.D.Page, J.Pakarinen, P.Petkov, P.Rahkila, B.Saha, M.Sandzelius, J.Saren, C.Scholey and J.Uusitalo.

 

Nuclear isomers in super heavy elements - stepping stones toward the island of stability

Nature (London) 442, 896 (2006)

R.D.Herzberg, P.T.Greenlees, P.A.Butler, G.D.Jones, M.Venhart, I.G.Darby, S.Eeckhaudt, K.Eskola, T.Grahn, C.Gray-Jones, F.P.Hessberger, P.Jones, R.Julin, S.Juutinen, S.Ketelhut, W.Korten, M.Leino, A.-P.Leppanen, S.Moon, M.Nyman, R.D.Page, J.Pakarinen, A.Pritchard, P.Rahkila, J.Saren, C.Scholey, A.Steer, Y.Sun, Ch.Theisen and J.Uusitalo.

 

Isomer spectroscopy in 254No

Phys.Scr. T125, 73 (2006)

R.D.Herzberg, P.T.Greenlees, P.A.Butler, G.D.Jones, I.G.Darby, S.Eeckhaudt, T.Grahn, C.Gray-Jones, F.P.Hessberger, P.Jones, R.Julin, S.Juutinen, S.Ketelhut, M.Leino, A.-P.Leppanen, S.Moon, M.Nyman, R.D.Page, J.Pakarinen, A.Pritchard, P.Rahkila, M.Sandzelius, J.Saren, C.Scholey, A.Steer, J.Uusitalo and M.Venhart.

 

Probing the limit of nuclear existence: Proton emission from 159Re

Phys. Lett. B 641, 34 (2006)

D.T.Joss, I.G.Darby, R.D.Page, J.Uusitalo, S.Eeckhaudt, T.Grahn, P.T.Greenlees, P.M.Jones, R.Julin, S.Juutinen, S.Ketelhut, M.Leino, A.-P.Leppanen, M.Nyman, J.Pakarinen, P.Rahkila, J.Saren, C.Scholey, A.Steer, A.J.Cannon, P.D.Stevenson, J.S.Al-Khalili, S.Erturk, M.Venhart, B.Gall, B.Hadinia and J.Simpson.

 

Discovery of 109Xe and 105Te: Superallowed α Decay near Doubly Magic 100Sn

Phys. Rev. Lett. 97, 082501 (2006)

S.N.Liddick, R.Grzywacz, C.Mazzocchi, R.D.Page, K.P.Rykaczewski, J.C.Batchelder, C.R.Bingham, I.G.Darby, G.Drafta, C.Goodin, C.J.Gross, J.H.Hamilton, A.A.Hecht, J.K.Hwang, S.Ilyushkin, D.T.Joss, A.Korgul, W.Krolas, K.Lagergren, K.Li, M.N.Tantawy, J.Thomson and J.A.Winger.

 

Recoil-beta tagging: A novel technique for studying proton drip line nuclei

Nucl. Instrum. Methods Phys. Res. A 565, 630 (2006)

A.N.Steer, D.G.Jenkins, R.Glover, B.S.Nara Singh, N.S.Pattabiraman, R.Wadsworth, S.Eeckhaudt, T.Grahn, P.T.Greenlees, P.Jones, R.Julin, S.Juutinen, M.Leino, M.Nyman, J.Pakarinen, P.Rahkila, J.Saren, C.Scholey, J.Sorri, J.Uusitalo, P.A.Butler, I.G.Darby, R.-D.Herzberg, D.T.Joss, R.D.Page, J.Thomson, R.Lemmon, J.Simpson and B.Blank.

 

2005

 

Cross section systematics for the lightest Bi and Po nuclei produced in complete fusion reactions with heavy ions

Phys. Rev. C 72, 014612 (2005)

A.N.Andreyev, D.Ackermann, S.Antalic, I.G.Darby, S.Franchoo, F.P.Hessberger, S.Hofmann, M.Huyse, P.Kuusiniemi, B.Lommel, B.Kindler, R.Mann, G.Munzenberg, R.D.Page, S.Saro, B.Sulignano, B.Streicher, K.Van de Vel, P.Van Duppen and D.R.Wiseman.

 

First identification of excited states in 106Te and evidence for isoscalar-enhanced vibrational collectivity

Phys. Rev. C 72, 041303 (2005)

B.Hadinia, B.Cederwall, J.Blomqvist, E.Ganioglu, P.T.Greenlees, K.Andgren, I.G.Darby, S.Eeckhaudt, E.Ideguchi, P.M.Jones, D.T.Joss, R.Julin, S.Juutinen, S.Ketelhut, K.Lagergren, A.-P.Leppanen, M.Leino, M.Nyman, J.Pakarinen, E.S.Paul, M.Petri, P.Rahkila, M.Sandzelius, J.Saren, C.Scholey, J.Uusitalo, R.Wadsworth and R.Wyss.

 

Evidence for oblate structure in 186Pb

Phys. Rev. C 72, 011304 (2005)

J.Pakarinen, I.G.Darby, S.Eeckhaudt, T.Enqvist, T.Grahn, P.T.Greenlees, V.Hellemans, K.Heyde, F.Johnston-Theasby, P.Jones, R.Julin, S.Juutinen, H.Kettunen, M.Leino, A.-P.Leppanen, P.Nieminen, M.Nyman, R.D.Page, P.M.Raddon, P.Rahkila, C.Scholey, J.Uusitalo and R.Wadsworth.

 

Probing the three shapes in 186Pb using in-beam γ-ray spectroscopy

Eur.Phys.J. A 25, Supplement 1, 449 (2005)

J.Pakarinen, I.Darby, S.Eeckhaudt, T.Enqvist, T.Grahn, P.Greenlees, F.Johnston-Theasby, P.Jones, R.Julin, S.Juutinen, H.Kettunen, M.Leino, A.-P.Leppanen, P.Nieminen, M.Nyman, R.Page, P.Raddon, P.Rahkila, C.Scholey, J.Uusitalo and R.Wadsworth.

 

In-beam and decay spectroscopy of very neutron deficient iridium nuclei

J.Phys.(London) G31, S1719 (2005)

C.Scholey, M.Sandzelius, S.Eeckhaudt, T.Grahn, P.T.Greenlees, P.Jones, R.Julin, S.Juutinen, M.Leino, A.-P.Leppanen, P.Nieminen, M.Nyman, J.Perkowski, J.Pakarinen, P.Rahkila, P.M.Rahkila, J.Uusitalo, K.Van de Vel, B.Cederwall, B.Hadinia, K.Lagergren, D.T.Joss, D.E.Appelbe, C.J.Barton, J.Simpson, D.D.Warner, I.G.Darby, R.D.Page, E.S.Paul and D.Wiseman.

Talks & Posters

Nuclear Physics Seminar at the Department of Physics & Astronomy, University of Tennessee, Knoxville, TN, USA.

'Proton emission in N≥82 nuclei: Recent results and future plans', October 2007.

 

Selected oral contribution to PROCON07: International Conference on Proton Emitting Nuclei, Lisbon, Portugal.

'A new alpha-decaying high-spin isomer in the proton-unbound nucleus 158Ta', June 2007.

 

Selected oral contribution to the Spring meeting of the American Physics Society, Jacksonville FL, USA.

Decay spectroscopy of the lightest proton-emitting Re isotopes’, April 2007.

 

Nuclear Physics Seminar at the Department of Physics & Astronomy, University of Tennessee, Knoxville, TN, USA.

'Jurogam + Ritu + Great, In-beam and decay spectroscopy at JYFL', January 2007.

 

Nuclear Physics Seminar at the Oliver Lodge Laboratory, Department of Physics, University of Liverpool.

Decay spectroscopy at the proton drip line above N = 82’, November 2006.

 

Oral contribution to UK Nuclear Physics Forum, CCLRC Daresbury, England.

 Decay spectroscopy of the lightest Rhenium isotopes’, November 2006.

 

Invited oral contribution to the UK Institute of Physics Nuclear Group Annual Conference, York, England.

Decay spectroscopy of the lightest proton-emitting Re isotopes’, April 2006.

 

Selected poster contribution and elected oral contribution to the Gordon Research Conference on Nuclear Chemistry, Colby-Sawyer College New London, NH, USA.

‘A New Alpha Decaying High-spin Isomer in the Very Neutron Deficient Nucleus 158Ta’, July 2005.

 

Oral contribution to the ‘Nuclear Structure Physics near the Coulomb Barrier’ workshop, Yale University, New Haven, CT, USA.

‘A New Alpha Decaying High-spin Isomer in the Very Neutron Deficient Nucleus 158Ta’, June 2005.

  

Selected oral contribution to the UK Institute of Physics Nuclear Group Annual Conference, Manchester.

‘A New Alpha Decaying High-spin Isomer in the Very Neutron Deficient Nucleus 158Ta’, March 2005.

 

Selected oral contribution to the Annual Meeting of the Finnish Physical Society, Espoo, Finland.

‘High Spin States in the N = 84 Isotones’, March 2005.

 

Selected oral contribution to the UK Institute of Physics Nuclear Group Annual Conference, Edinburgh.

‘Search for an Oblate Band in 186Pb’, April 2004.