[back to index] [Exp. 1: He & C ions on C, Al, Cu, Pb] [Exp.2:Ne ions on C, Al, Cu, Pb] [Exp.3:Ar, Fe, Xe & Si ions on C, Al, Cu, Pb]
HIMAC experiments with He, C, Ne, Ar, Fe, Xe and Si ions on C, Al, Cu & Pb targets
1. Name of Experiment: ------------------ HIMAC experiments stopping He, C, Ne, Ar, Xe, Fe & Si ions on Al, C, Cu & Pb targets. 2. Purpose and Phenomena Tested: ---------------------------- Carbon, Aluminum, Copper and Lead targets were bombarded with He, C, Ne, Ar, Fe, Xe and Si ions of energies ranging from 100 to 800 MeV/nucleon. They were performed at the Heavy Ion Medical Accelerator of Chiba (HIMAC) depending of the National Institute of Radiological Sciences (NIRS) of Japan in different experimental sets from 1997 to 1999. 3. Description of Source and Experimental Configuration: ---------------------------------------------------- The energy of the projectile is 100 and 180 MeV/nucleon for He ions, 100, 180 and 400 MeV/nucleon for C and Ne ions, 400 MeV/nucleon for Ar, Fe and Xe ions and 800 MeV/nucleon for Si ions. The Si ions are only stopped on C and Cu targets. The beam is extracted from the synchrotron with a time pulse of 0.5 seconds every 3.3 seconds. The microtime structure corresponds to 5 MHz. The target is a 10x10 cm2 plate of carbon, aluminum, copper and lead. Its thickness is calculated to stop completely the incident particles and is given in Table 1. 4. Measurement System: ------------------ Neutron detectors are located at laboratory angles of 0, 7.5, 15, 30, 60 and 90 deg. The measurements were performed simultaneously at 3 detectors each time. Each neutron detector consists of a NE-213 liquid scintillator 12.7 cm in diameter and 12.7 cm thick, covered first with glass 1 mm thick and externally with aluminum 1.6 mm thick. These are the E counters. Other detectors, plastic scintillators NE102A, are 15x15 cm2 plates 0.5 cm thick. These are the delta-E counters to discriminate charged particles. The detectors-target layout can be seen in Figure 1 for a typical measurement position, and is taken from Ref. 1. The detectors efficiency has been calculated by using the M.C. code by Cecil et al. (Ref. 5). Background neutrons were measured by interposing iron bars 15x15 cm2 square and 60 cm long. 5. Description of Results and Analysis: ----------------------------------- The numerical results of the experiments are given in terms of neutrons produced per angle unit(sr), per energy unit(MeV) and per incident particle. They are presented as follows: in Tables 2 to 7 for He ions with 100 MeV/nucleon in Tables 8 to 13 for He ions with 180 MeV/nucleon in Tables 14 to 19 for C ions with 100 MeV/nucleon in Tables 20 to 25 for C ions with 180 MeV/nucleon in Tables 26 to 31 for C ions with 400 MeV/nucleon in Tables 32 to 37 for Ne ions with 100 MeV/nucleon in Tables 38 to 43 for Ne ions with 180 MeV/nucleon in Tables 44 to 49 for Ne ions with 400 MeV/nucleon in Tables 50 to 55 for Ar ions with 400 MeV/nucleon in Tables 56 to 61 for Fe ions with 400 MeV/nucleon in Tables 62 to 67 for Xe ions with 400 MeV/nucleon in Tables 68 to 73 for Si ions with 800 MeV/nucleon The statistical uncertainties vary from 2 to 5% at low and mid-energy but increases until 30% for the energy threshold. The room scattered background is less than 10%. The total normalization uncertainty is less than 14%. The transport calculations using MCNPX code were done by P. Ortego and are described in Ref. [8]. Some results are provided in file HIMAC_PO.xls. The two models for HIMAC experiments with alpha particles on C, Al, Cu and Pb are given in files mcnpxhim.015 and mcnpxhim.390. Two models are necessary because of the target is turned 45 deg. for some detectors, so HIM015 is the case for detectors 0 to 15 deg. (no turn of target) and HIM390 is the case for detectors 30 to 90 deg. (target turned 45 deg.). The different atom densities for other target materials are given in comment lines. The same is done for the alpha particle energy. Default values for high energy models are used. 6. Special Features: ---------------- None 7. Author/Organizer: ---------------- Experiment and Analysis: T. Kurosawa, T. Nakamura, H. Iwase and H. Sato (Cyclotron and Radioisotope Center of Tohoku University), N. Nakao and T. Shibata (High Energy Accelerator Research Organization), Y. Uwamino and N. Nakanishi (The Institute of Physical and Chemical Research), A. Fukumura and K. Murakami (National Institute of Radiological Sciences). Phone (Kurosawa): +81.298.61.5927 Fax (Kurosawa): +81.298.61.5673 Compiler of data for Sinbad: P. Ortego SEA, Shielding Engineering and Analysis S.L., Avda. Atenas 75, Las Rozas, 28230 Madrid, Spain Phone: +34 91.631.7807 Fax: +34 91.631.8266 Reviewer of compiled data: I. Kodeli OECD/NEA, 12 bd des Iles, 92130 Issy les Moulineaux, France 8. Availability: ------------ Unrestricted 9. References: ---------- [1] T. Kurosawa et al. "Measurements of Secondary Neutrons Produced from Thick Targets Bombarded by High Energy Helium and Carbon Ions", Nuclear Science and Eng. vol. 132, p. 30 (1999) [2] T. Kurosawa et al. "Spectral measurements of neutrons, protons, deuterons and tritons produced by 100 MeV/nucleon He bombardment", Nuclear Instruments and Methods in Physics Research, Vol. A 430, p. 400 (1999) [3] T. Kurosawa et al. "Measurements of Secondary Neutrons Produced from Thick Target Bombarded by High Energy Neon Ions" Journal of Nuclear Science and Technology, vol. 36, p.41 (1999) [4] T. Kurosawa et al. "Neutrons yields from thick C, Al, Cu and Pb targets bombarded by 400 MeV/nucleon Ar, Fe, Xe and 800 MeV/nucleon Si ions", Physical Review C, vol. 62, p. 044615-1 (2000) [5] R.A. Cecil et al. "Improved predictions of neutron detection efficiency for hydrocarbon scintillators from 1 MeV to about 300 MeV", Nuclear Instrum. and Methods, Vol. 161, p. 439 (1979). [6] N. Nakao et al. "Measurements of response function of organic liquid scintillator for neutron energy range up to 135 MeV", Nuclear Instruments and Methods in Physics Research, Vol. A-362, p. 454 (1995) [7] T. Kurosawa, T. Nakamura and L. Heilbronn, Experimental Data of Neutron Yields from Thick Targets Bombarded by 100 to 800 MeV/nucleon Heavy Ions. [8] P. Ortego, Benchmarking of MCNPX with the Experimental Measurements of High-Energy Helium Ions in HIMAC Facility, also in Rad. Prot. Dosimetry, 116(1-4), Pp.43-49 (2005) 10. Data and Format: --------------- DETAILED FILE DESCRIPTIONS -------------------------- Filename Size(kb) Content ------------- -------- ------------------------- 1 himac-a.htm 10 This information file 2 himac-e1.htm 56 1st. part of experiment description 3 himac-e2.htm 33 2nd. part of descrip. (Ne tables) 4 himac-e3.htm 46 3rd. part of descrip. (Ar-Si tables) 5 HIMFig1.pdf 7 Plane view of the experiment 6 mcnpxhim.015 6 MCNPX input file (P. Ortego) - 0 to 15 deg. 7 mcnpxhim.390 6 MCNPX input file (P. Ortego) - 30 to 90 deg. 8 HIMAC_PO.xls 740 Calculational results by P. Ortego 9 nse-132.pdf 2665 Paper Nucl. Sci. & Eng. 10 nima-430.pdf 1836 Paper N. Instr. and Methods 11 nst-36.pdf 1211 Paper J. of N. Science & Technol. 12 prc-62.pdf 1864 Paper Physical Review C vol. 62 13 nim-161.pdf 838 Cecil et al. on detector efficiency 14 m001.pdf 37 Paper by T. Kurosawa et al. 15 p_ortego.pdf 184 Paper by P. Ortego SINBAD Benchmark Generation Date: 01/2003 SINBAD Benchmark Last Update: 03/2006