UNC NUCLEAR ASTROPHYSICS

Department of Physics & Astronomy

Laboratory for Experimental Nuclear Astrophysics

Classical Novae

Buckner, M.Q., Iliadis, C., Kelly, K.J., Downen, L.N., Champagne, A.E., Cesaratto, J.M., Howard, C., and Longland, R. High-intensity beam study of 17O(p, γ)18F and thermonuclear reaction rates for 17O+p. Phys. Rev. C 91, 015812, 15 pages (2015).

Kelly, K.J., Iliadis, C., Downen, L., Jose, J., and Champagne, A.E. Nuclear mixing meters for classical novae. Astrophys. J. 777, 130, 7 pages (2013).

Downen, L.N., Iliadis, C., Jose, J., and Starrfield, S. Nuclear thermometers for classical novae. Astrophys. J. 762, 105 (11 pages) (2013).

Newton, J.R., Iliadis, C., Champagne, A.E., Cesaratto, J.M., Daigle, S., and Longland, R. Measurement of 17O(p,γ)18F between the narrow resonances at Er=193 and 519 keV. Phys. Rev. C 81, 045801, 8 pages (2010).

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Reviews

Iliadis, C., Longland, R., Coc, A., Timmes, F.X., and Champagne, A.E. Statistical models for thermonuclear reaction rates and nucleosynthesis studies. J. Phys. G: Nucl. Part. Phys. 42, 034007, 18 pages (2015).

Champagne, A.E., Iliadis, C., and Longland, R. Nuclear astrophysics in the laboratory and in the universe. AIP Advances 4, 041006, 22 pages (2014).

Jose, J, and Iliadis, C. Nuclear Astrophysics: the Unfinished Quest for the Origin of  the Elements. Rep. Prog. Phys. 74, 096901, 48 pages (2011).

AGB and RG Stars

Cesaratto, J.M., Champagne, A.E., Buckner, M.Q., Clegg, T.B., Daigle, S.M., Howard, C., Iliadis, C., Longland, R., Newton, J.R., and Oginni, B.M. Measurement of the Er(c.m.)=138 keV resonance in the 23Na(p,γ)24Mg reaction and the abundance of sodium in AGB stars. Phys. Rev. C 88, 065806, 14 pages (2013).

Buckner, M.Q., Iliadis, C., Cesaratto, J.M., Howard, C., Clegg, T.B., Champagne, A.E., and Daigle, S. Thermonuclear reaction rate of 18O(p,γ)19F. Phys. Rev. C 86, 065804, 10 pages (2012).

Halabi, G.H. The Effect of the 14N(p,γ)15O Reaction on the Blue Loops in Intermediate Mass Stars. Astrophys. J. 761, 10, 11 pages (2012).

s- and r-Process

Raut, R., Tonchev, A.P., Rusev, G., Tornow, W., Iliadis, C., Lugaro, M., Buntain, J., Goriely, S., Kelley, J.H., Schwengner, R., Banu, A., and Tsoneva, N. Cross-section measurement of the 86Kr(γ,n) reaction to probe the s-process branching at 85Kr. Phys. Rev. Lett. 111, 112501, 5 pages (2013).

Longland, R, Iliadis, C., and Karakas, A.I. Reaction rates for the s-process neutron source 22Ne+α. Phys. Rev. C 85, 065809, 20 pages (2012).

Arnold, C.W., Clegg, T.B., Iliadis, C., Karwowski, H.J., Rich, G.C., Tompkins, J.R., and Howell, C.R. Cross-section measurement of 9Be(γ,n)8Be and implications for α+α+n-->9Be in the r process. Phys. Rev. C 85, 044605, 11 pages (2012).

DeBoer, R.J., Wiescher, M., Goerres, J., Longland, R., Iliadis, C., Rusev, G., and Tonchev, A.P. Photoexcitation of astrophysically important states in 26Mg. II. Ground-state-transition partial widths. Phys. Rev. C 82, 025802, 6 pages (2010).

Reaction Rates/Nuclear Theory

Sallaska, A, Iliadis, C., Champagne, A.E., Goriely, S., STarrfield, S., and Timmes, F.X. STARLIB: A next-generation reaction-rate library for nuclear astrophysics. Astrophys. J. Suppl. 207, 18 (58pp) (2013).

Pogrebnyak, I., Howard, C., Iliadis, C., Longland, R., and Mitchell, G.E. Mean proton and α-particle reduced widths of the Porter-Thomas distribution and astrophysical applications. Phys. Rev. C 88, 015808, 10 pages (2013).

Iliadis, C., Longland, R., Champagne, A.E., and Coc, A. Charged-particle thermonuclear reaction rates: IV. Comparison to previous work. Nucl. Phys. A 841, 323-388 (2010).

Iliadis, C., Longland, R., Champagne, A.E., and Coc, A. Charged-particle thermonuclear reaction rates: III. Nuclear physics input. Nucl. Phys. A 841, 251-322 (2010).

Iliadis, C., Longland, R., Champagne, A.E., Coc, A., and Fitzgerald, R. Charged-particle thermonuclear reaction rates: II. Tables and graphs of reaction rates and probability density functions. Nucl. Phys. A 841, 31-250 (2010).

Longland, R., Iliadis, C., Champagne, A.E., Newton, J.R., Ugalde, C., Coc, A., and Fitzgerald, R. Charged-particle thermonuclear reaction rates: I. Monte Carlo method and statistical distributions. Nucl. Phys. A 841, 1-30 (2010).

Massive Stars

Iliadis, C., Champagne, A. E., Chieffi, A., and Limongi, M. The effects of thermonuclear reaction-rate variations on 26Al production in massive stars: a sensitivity study. Astrophys. J. Suppl. 193, 16, 23 pages (2011).

Oginni, B. M., Iliadis, C.,  and Champagne, A. E.  Theoretical  evaluation of  the reaction rates for 26Al(n,p)26Mg and 26Al(n,α)23Na. Phys. Rev. C 83, 025802, 9 pages (2011).

Tang. X.D. et al. Determination of the E1 Component of the Low-Energy 12C(α,γ)16O Cross Section. Phys. Rev. C. 81, 045809, 14 pages (2010).

Instrumentation/Methods

Kelly, K.J., Champagne, A.E., Longland, R., and Buckner, M.Q.  New recommended wγ for the Er^cm=458 keV resonance in 22Ne(p,γ)23Na. Phys. Rev. C 92, 035805 (2015).

Howard, C., Iliadis, C., and Champagne, A.E. Monte Carlo simulations of the LENA detector system. Nucl. Instr. Meth.  729, 254-259 (2013).

Mohr, P., and Iliadis, C. Recommended cross section of the 16O(p,γ)17F reaction below 2.5 MeV: a potential tool for quantitative analysis and depth profiling of oxygen. Nucl. Instr. Meth. A 688, 62-65 (2012).

Longland, R., Iliadis, C., Cesaratto, J.M., Champagne, A.E., Daigle, S., and Newton, J. R. Resonance strength in 22Ne(p,γ)23Na from depth profiling in aluminium. Phys. Rev. C 81, 055804, 8 pages (2010).

Carson, S., Iliadis, C., Cesaratto, J., Champagne, A.E., Downen, L., Ivanovic, M., Kelley, J., Longland, R., Newton, J.R., Rusev, G., and Tonchev, A. Ratio of germanium detector peak efficiencies at photon energies of 4.4 and 11.7 MeV: experiment versus simulation. Nucl. Instr. Meth. A 618, 190-198 (2010).

Cesaratto, J.M., Champagne, A.E., Clegg, T.B., Buckner, M.Q., Runkle, R.C., and Stefan, A., Nuclear astrophysics studies at LENA: the accelerators, Nucl. Instr. and Meth. Phys. A 623, 888 (2010).

Type I X-Ray Bursts

Mohr, P., Longland, R., and Iliadis, C. Thermonuclear reaction rate of 18Ne(α,p)21Na from Monte Carlo calculations. Phys. Rev. C 90, 015812, 15 pages (2015).

Parikh, A., Jose, J., Sala, G., and Iliadis, C. Nucleosynthesis in type I x-ray bursts. Prog. Part. Nucl. Phys. 69, 225-253 (2013).

Jose, J., Moreno, F., Parikh, A., and Iliadis, C. Hydrodynamic Models of type I x-ray bursts: metallicity effects. Astrophys. J. Suppl. 189, 204-239, (2010).

Hale, S.E. 22Ne(p,γ)23Na, 23Na(p,γ)24Mg, and globular cluster abundance anomalies, 1999.  Supervisor: A.E. Champagne.

Powell, D.C. Determination of the 24Mg(p,γ)25Al reaction rate at low stellar temperatures, 1999. Supervisor: C. Iliadis.

Blackmon, J.C. Measurement of the 17O(p,α) 14N cross section at stellar energies, 1994. Supervisor: A.E. Champagne.

Rowland, C. Hydrogen burning of 23Na in globular cluster red giant stars, 2003. Supervisor: C. Iliadis.

Runkle, R.C. A new measurement of the  fusion reaction 14N(p,γ)15O and its impact on hydrogen burning, globular clusters, and the age of the universe, 2003. Supervisor: A.E. Champagne.

Fitzgerald, R.P. Measurement of the 1H(7Be, 8B)γ cross section, 2005. Supervisor: A.E. Champagne.

Bertone, P.F. Indirect approaches to constraining the best estimate of the astrophysical S-factor for proton radiative capture on 14N, 2010. Supervisor: A.E. Champagne.

Longland, R.L. Investigation of the s-process neutron source 22Ne+α, 2010. Supervisor: C. Iliadis.

Newton, J. Hydrogen burning of 17O, 2010. Supervisor: C. Iliadis.

Arnold, C.W. Absolute total cross-section for photodisintegration of Beryllium-9, 2011. Supervisor: T.B. Clegg.

Cesaratto, J.M. Resonant proton capture on 23Na and elemental variations in globular cluster stars, 2011. Supervisor: A.E. Champagne.

Meteorites

Howard, C., Fern, M., Cesaratto, J., Daigle, S., and Iliadis, C. Radioisotope studies of the Farmville meteorite using γγ-coincidence spectrometry. App. Rad. Isotopes 94, 23-29  (2014).

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Daigle, S.M. Low energy proton capture study of the 14N(p,γ)15O reaction, 2013. Supervisor: A.E. Champagne.

Buckner, M.Q. Hydrogen burning of the rare oxygen isotopes, 2014. Supervisor: C. Iliadis.

Big Bang Nucleosynthesis

Coc, A., Petitjean, P., Uzan, J.-P., Vangioni, E., Descouvemont, P., Iliadis, C., and Longland, R. New reaction rates for improved primordial D/H calculation and the cosmic evolution of deuterium. Phys. Rev. D, in print (2016).