The TUNL neutron-neutron scattering length experiment

Journal Article · Sat Apr 01 04:00:00 EST 1995 · Bulletin of the American Physical Society

OSTI ID:375063

Trotter, D E.G.; Tornow, W; Howell, C R ^[1]

---

1. and others

Since an accurate value for the neutron-neutron (nn) scattering length a{sub nn} is of fundamental interest, its determination should not rely on one source of experimental information only. Besides the {pi} d capture reaction, the nd breakup reaction has been the classical reaction used for determining a{sub nn}. However, none of the published values for a{sub nn} obtained from kinematically complete nd {yields} n+n+p breakup data are based on a rigorous treatment of the three-nucleon continuum. In addition, the scale uncertainty associated with the existing nd breakup cross-section data in the region of the nn final-state interaction peak is too large to allow for a meaningful reanalysis. Therefore, a new kinematically complete nd breakup experiment is underway at TUNL at an incident neutron energy of 13 MeV. State-of-the-art three-nucleon continuum calculations will be used to analyze the data. In order to investigate the possible influence of three-nucleon force effects, a{sub nn} will be determined from data taken at four production angles of the nn pair between 20.5{degrees} and 43{degrees} (lab).

• DOE Contract Number: FG05-91ER40619
• OSTI ID: 375063
• Report Number(s): CONF-9304297--
• Journal Information: Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 2 Vol. 40; ISSN BAPSA6; ISSN 0003-0503
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BREAKUP REACTIONS
MEV RANGE 10-100
NEUTRON-NEUTRON INTERACTIONS
SCATTERING LENGTHS