A Model of GEANT4 for d ! np Reaction with an Effective Field Theory

We develop a new hadronic model for GEANT4 which is specialized for the disintegration of the deuteron by photons, d ! np. For the description of two-nucleon interac- tions, we employ an pionless effective field theory with dibaryon fields (dEFT). In spite of its simplicity, the theory has proven very effective and useful in the applications to various two- nucleon systems and processes at low energies. We apply the new model for GEANT4 (G4dEFT) to the calculation of total and differential cross sections in d ! np, and obtain good agreements to empirical data for a variety of observables. As an application of the model developed, we calculate the neutron yield from + CD2 process. G4dEFT predicts a peak for the neutron yield due to d ! np, but existing model of GEANT4 shows no peak structure and gives monotonic decrease of neutron yield as the photon energy increases.

[1]  Kyung Joo Min,et al.  Neutron spectra produced by 30, 35 and 40 MeV proton beams at KIRAMS MC-50 cyclotron with a thick beryllium target , 2015 .

[2]  Kyung Joo Min,et al.  Validation of GEANT4 simulations for percentage depth dose calculations in heterogeneous media by using small photon beams from the 6-MV Cyberknife: Comparison with photon beam dosimetry with EBT2 film , 2015 .

[3]  Jae Won Shin,et al.  New charge exchange model of GEANT4 for $^9Be(p,n)^9B$ reaction , 2014, 1404.5844.

[4]  Jae Won Shin,et al.  GEANT4 and PHITS simulations of the shielding of neutrons from the 252Cf source , 2014, 1402.1847.

[5]  Taesung Kim,et al.  Development of optical monitor of alpha radiations based on CR-39. , 2013, Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine.

[6]  C. H. Hyun,et al.  Polarization of the neutron induced by hadronic weak interactions in the photodisintegration of the deuteron , 2013, 1303.4494.

[7]  C. H. Hyun,et al.  Parity-Violating Asymmetry in γd → np with a Pionless Effective Theory , 2011, 1110.1437.

[8]  Jong Tae Kim,et al.  Estimates of SEU for Semiconductors Using MC50 Cyclotron and Geant4 Simulation. , 2011 .

[9]  S. Hong,et al.  GEANT4 simulation of the shielding of Neutrons from 252Cf source , 2011 .

[10]  T. Suh,et al.  Application of a GEANT4 simulation to a 60CO therapy unit , 2011 .

[11]  Jong Tae Kim,et al.  Analysis of Single-event Upset for SRAM Devices by Using the MC-50 Cyclotron , 2011 .

[12]  S. Incerti,et al.  Effect of a magnetic field on the track structure of low-energy electrons: a Monte Carlo study , 2010 .

[13]  C. H. Hyun,et al.  Parity-violating polarization in np->dgamma with a pionless effective field theory , 2009, 0907.3995.

[14]  J. K. Meena,et al.  Variation of neutron detection characteristics with dimension of BC501A neutron detector , 2009 .

[15]  U. Manchester,et al.  Proton-proton fusion in pionless effective theory , 2008, 0801.4330.

[16]  M. Blackston.  PRECISION MEASUREMENTS OF DEUTERON PHOTODISINTEGRATION USING LINEARLY POLARIZED PHOTONS OF 14 AND 16 MEV , 2007 .

[17]  S. Incerti,et al.  Geant4 developments and applications , 2006, IEEE Transactions on Nuclear Science.

[18]  R. Cyburt,et al.  Radiative neutron capture on a proton at BBN energies , 2005, nucl-th/0511074.

[19]  H. Ohgaki,et al.  Simultaneous measurement of the photodisintegration of He 4 in the giant dipole resonance region , 2005, nucl-ex/0509017.

[20]  C. H. Hyun,et al.  Effective field theory of the deuteron with dibaryon fields , 2004, nucl-th/0407103.

[21]  Rafael García-Tenorio,et al.  GEANT4 code for simulation of a germanium gamma-ray detector and its application to efficiency calibration , 2004 .

[22]  Hideaki Ohgaki,et al.  Photodisintegration of deuterium and big bang nucleosynthesis , 2003 .

[23]  A. Heikkinen,et al.  Bertini intra-nuclear cascade implementation in Geant4 , 2003, nucl-th/0306008.

[24]  M. Kossov,et al.  Electro and gamma nuclear physics in Geant4 , 2003, nucl-th/0306012.

[25]  S. Pearlstein,et al.  CSEWG SYMPOSIUM, A CSWEG RETROSPECTIVE. 35TH ANNIVERSARY CROSS SECTION EVALUATION WORKING GROUP, NOV. 5, 2001, BROOKHAVEN NATIONAL LABORATORY. , 2001 .

[26]  S. Beane,et al.  Rearranging pionless effective field theory , 2000, nucl-th/0011067.

[27]  G. Rupak,et al.  Nucleon polarisabilities from Compton scattering on the deuteron , 2000, nucl-th/0012096.

[28]  G. Rupak.  Precision Calculation of n+p->d+gamma Cross Section for Big-Bang Nucleosynthesis , 1999, nucl-th/9911018.

[29]  M. Savage,et al.  Isoscalar M1 and E2 amplitudes in np? d? 1 The preprint formally known as Suppressed Amplitudes in n , 1999 .

[30]  M. Savage,et al.  n p ---> d gamma for big bang nucleosynthesis , 1999, nucl-th/9907042.

[31]  M. Savage,et al.  Nucleon-nucleon effective field theory without pions , 1999, nucl-th/9902056.

[32]  U. V. Kolck.  Effective field theory of short-range forces , 1998, nucl-th/9808007.

[33]  P. Bedaque,et al.  Nucleon-Deuteron Scattering from an Effective Field Theory , 1997, nucl-th/9710073.

[34]  D. Kaplan.  More effective field theory for non-relativistic scattering , 1996, nucl-th/9610052.

[35]  M. Wise,et al.  Nucleon-nucleon scattering from effective field theory , 1996, nucl-th/9605002.

[36]  D. Ryckbosch,et al.  The forward, backward and 90° deuteron photodisintegration between 7 and 19 MeV photon energy , 1991 .

[37]  Moreh,et al.  2H( gamma,n) absolute cross section at 2754 keV. , 1989, Physical review. C, Nuclear physics.

[38]  Belli,et al.  Measurement of the 4He( gamma,p)3H total cross section and charge symmetry. , 1988, Physical review. C, Nuclear physics.

[39]  Wolf,et al.  Differential cross sections for the D( gamma,n) reaction below 10 MeV. , 1988, Physical review letters.

[40]  Stephenson,et al.  Measurements of relative angular distributions for the 2H , 1987, Physical review. C, Nuclear physics.

[41]  Giordano,et al.  Total cross section for deuteron photodisintegration between 15 and 75 MeV. , 1986, Physical review letters.

[42]  Moreh,et al.  Absolute cross section for the photodisintegration of deuterium. , 1985, Physical review. C, Nuclear physics.

[43]  Giordano,et al.  Polarization asymmetry in the photodisintegration of the deuteron. , 1985, Physical review. C, Nuclear physics.

[44]  B. Mosconi,et al.  Cross section and polarization in deuteron photodisintegration: general formulas , 1982 .

[45]  H. Arenhövel.  BARYONIC EXCITATIONS AND MESON EXCHANGE CURRENTS IN NUCLEI , 1982 .

[46]  M. Kröning,et al.  Photodisintegration of the deuteron at 15-25 MeV photon energy , 1974 .

[47]  J. J. Murphy,et al.  Photodisintegration of deuterium determined from the electrodisintegration process , 1974 .

[48]  J. Baglin,et al.  2H(γ, p) absolute cross section and angular distribution at 17–25 MeV , 1973 .

[49]  F. Partovi.  Deuteron photodisintegration and n-p capture below pion production threshold☆☆☆ , 1964 .