Pionic fusion at subthreshold energies

L. Joulaeizadeh; J. Bacelar; M. Eslami-Kalantari; I. Gasparic; N. Kalantar-Nayestanaki; H. Löhner; H. Mardanpour; J. G. Messchendorp; H. Moeini; A. Ramazani-Moghaddam-Arani; S. V. Shende; E. Stephan

doi:10.1142/s0217751x09044024

Pionic fusion at subthreshold energies

L. Joulaeizadeh^*, J. Bacelar, M. Eslami-Kalantari, I. Gasparic, N. Kalantar-Nayestanaki, H. Löhner, H. Mardanpour, J. G. Messchendorp, H. Moeini, A. Ramazani-Moghaddam-Arani, S. V. Shende, E. Stephan

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

In order to study the role of pions and clustering phenomena in nuclei, two experiments have been performed using the AGOR accelerator facility. In collisions of two nuclei a pion and a fused nucleus were produced. The examined reactions were (4)He((3)He, pi(0))(7)Be and (6)Li((4)He, pi(0))(10)B at beam energies about 10 MeV above the coherent pion production threshold ( 256 MeV and 236.4 MeV, respectively). Since the available energy is well below the pion production threshold in an elementary nucleon-nucleon process, a highly coherent mechanism is needed. We identified the reaction by measuring the fused system in the magnetic spectrometer and the produced neutral pions in the Plastic Ball detection system with large acceptance. Our experimental setup provided the exclusive cross sections by identifying all products in overdetermined kinematics. Here we present the preliminary results of the analysis for the second reaction. Angular distribution of neutral pions will be discussed.

Original language	English
Pages (from-to)	539-543
Number of pages	5
Journal	International Journal of Modern Physics A
Volume	24
Issue number	2-3
DOIs	https://doi.org/10.1142/s0217751x09044024
Publication status	Published - 30-Jan-2009
Event	Conference MESON 2008 - , Poland Duration: 6-Jun-2008 → 10-Jun-2008

Keywords

Pionic fusion
neutral pion production
subthreshold energy

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Pionic fusion at subthreshold energies
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title = "Pionic fusion at subthreshold energies",

abstract = "In order to study the role of pions and clustering phenomena in nuclei, two experiments have been performed using the AGOR accelerator facility. In collisions of two nuclei a pion and a fused nucleus were produced. The examined reactions were (4)He((3)He, pi(0))(7)Be and (6)Li((4)He, pi(0))(10)B at beam energies about 10 MeV above the coherent pion production threshold ( 256 MeV and 236.4 MeV, respectively). Since the available energy is well below the pion production threshold in an elementary nucleon-nucleon process, a highly coherent mechanism is needed. We identified the reaction by measuring the fused system in the magnetic spectrometer and the produced neutral pions in the Plastic Ball detection system with large acceptance. Our experimental setup provided the exclusive cross sections by identifying all products in overdetermined kinematics. Here we present the preliminary results of the analysis for the second reaction. Angular distribution of neutral pions will be discussed.",

keywords = "Pionic fusion, neutral pion production, subthreshold energy",

author = "L. Joulaeizadeh and J. Bacelar and M. Eslami-Kalantari and I. Gasparic and N. Kalantar-Nayestanaki and H. L{\"o}hner and H. Mardanpour and Messchendorp, {J. G.} and H. Moeini and A. Ramazani-Moghaddam-Arani and Shende, {S. V.} and E. Stephan",

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doi = "10.1142/s0217751x09044024",

language = "English",

volume = "24",

pages = "539--543",

journal = "International Journal of Modern Physics A",

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TY - JOUR

T1 - Pionic fusion at subthreshold energies

AU - Joulaeizadeh, L.

AU - Bacelar, J.

AU - Eslami-Kalantari, M.

AU - Gasparic, I.

AU - Kalantar-Nayestanaki, N.

AU - Löhner, H.

AU - Mardanpour, H.

AU - Messchendorp, J. G.

AU - Moeini, H.

AU - Ramazani-Moghaddam-Arani, A.

AU - Shende, S. V.

AU - Stephan, E.

PY - 2009/1/30

Y1 - 2009/1/30

N2 - In order to study the role of pions and clustering phenomena in nuclei, two experiments have been performed using the AGOR accelerator facility. In collisions of two nuclei a pion and a fused nucleus were produced. The examined reactions were (4)He((3)He, pi(0))(7)Be and (6)Li((4)He, pi(0))(10)B at beam energies about 10 MeV above the coherent pion production threshold ( 256 MeV and 236.4 MeV, respectively). Since the available energy is well below the pion production threshold in an elementary nucleon-nucleon process, a highly coherent mechanism is needed. We identified the reaction by measuring the fused system in the magnetic spectrometer and the produced neutral pions in the Plastic Ball detection system with large acceptance. Our experimental setup provided the exclusive cross sections by identifying all products in overdetermined kinematics. Here we present the preliminary results of the analysis for the second reaction. Angular distribution of neutral pions will be discussed.

AB - In order to study the role of pions and clustering phenomena in nuclei, two experiments have been performed using the AGOR accelerator facility. In collisions of two nuclei a pion and a fused nucleus were produced. The examined reactions were (4)He((3)He, pi(0))(7)Be and (6)Li((4)He, pi(0))(10)B at beam energies about 10 MeV above the coherent pion production threshold ( 256 MeV and 236.4 MeV, respectively). Since the available energy is well below the pion production threshold in an elementary nucleon-nucleon process, a highly coherent mechanism is needed. We identified the reaction by measuring the fused system in the magnetic spectrometer and the produced neutral pions in the Plastic Ball detection system with large acceptance. Our experimental setup provided the exclusive cross sections by identifying all products in overdetermined kinematics. Here we present the preliminary results of the analysis for the second reaction. Angular distribution of neutral pions will be discussed.

KW - Pionic fusion

KW - neutral pion production

KW - subthreshold energy

U2 - 10.1142/s0217751x09044024

DO - 10.1142/s0217751x09044024

M3 - Article

VL - 24

SP - 539

EP - 543

JO - International Journal of Modern Physics A

JF - International Journal of Modern Physics A

SN - 0217-751X

IS - 2-3

T2 - Conference MESON 2008

Y2 - 6 June 2008 through 10 June 2008

ER -