The project "TANGRA" (TAgged Neutrons and Gamma RAys) is devoted to study of neutron-nuclear interactions, using the tagged neutron method (TNM).  The essence of TNM is to register the characteristic nuclear gamma-radiation, resulting from the interaction of neutrons from the binary d(t, 4He)n reaction with the nuclei of the substances under study, in coincidence with the accompanying alpha-particles detected by the position-sensitive alpha detector located inside the neutron generator vacuum chamber.

Collaboration: JINR (FLNP, VBLHEP, DLNP, LRB), Dubna, Russia VNIIA (Moscow, Russia) Diamant LLC, Dubna, Russia SINP-MSU (Moscow, Russia) INRNE-BAS (Sofia, Bulgaria) IC-ASM (Chisinau, Moldova) IGGP-ANAS (Baku, Azerbaijan) DP-Banaras Hindu University (Varanasi, India) SEPE, Xi’an Jiaotong University (China) Alexandria University (Egypt) University of Novi Sad (Serbia) Ruđer Bošković Institute (Zagreb, Croatia)

I. TANGRA Setups

Multidetector, multipurpose, multifunctional, mobile systems, to study the characteristics of the products from the nuclear reaction induced by 14 MeV tagged neutrons. TANGRA Setups consist of a portable generator of “tagged” neutrons with energies of 14.1 MeV, ING-27, with or without an iron shield-collimator, 2D fast neutron beam profilometer, arrays of neutron-gamma detectors in geometry of daisy-flower (Romashka, Romasha, HPGe), and a computerized system for data acquisition and analysis (DAQ).

NaI(Tl) Romashka

Number of NaI(Tl) detectors: 22
NaI(Tl) crystals: hexagonal prism (78 x 90 x 200 mm)
PMT type: Hamamatsu R1306
Gamma-ray Energy-resolution ~ 7.2% @ 0.662 MeV
Gamma-ray Energy-resolution ~ 3.6% @ 4.437 MeV
Gamma-ray Time-resolution ~ 3.8ns @ 4.437 MeV

BGO Romasha

Number of BGO detectors: 18
BGO crystals: cylinder (76 x 65 mm)
PMT type: Hamamatsu R1307
Gamma-ray Energy-resolution ~ 10.4% @ 0.662 MeV
Gamma-ray Energy-resolution ~ 4.0% @ 4.437 MeV
Gamma-ray Time-resolution ~ 4.1ns @ 4.437 MeV

HPGe Romasha

Number of HPGe detectors: 1
Type: Ortec®GMX 30-83-PL-S, f57.5 x 66.6 mm
Gamma-ray Energy-resolution ~ 3.4% @ 0.662 MeV
Gamma-ray Energy-resolution ~ 0.3% @ 4.437 MeV
Gamma-ray Time-resolution ~ 6.1 ns @ 4.4437MeV

 

II. Science

• Neutron Induced Nuclear Reaction Characteristics:
  Neutron-Nuclear Reactions theory
  Nuclear Astrophysics (Fusion in Tokamak and Stars)
  Neutron-Nuclear Reactions in Advance Reactors
• Elemental and Isotopic Composition of materials
  Nuclear Forensics (Explosives, Drugs, Fissile Materials)
  Art, Archeology, Mining (Diamonds, Coke)
  Nuclear Geophysics and Planetology (Water on Mars)
  Neutron Imaging, Radiography and Tomography
  Neutron-Nuclear Medicine (Cancer treatment)
•  Methodical Research
  Detectors for use in intense neutron fields
  Algorithms for the analysis of experimental data

III. Contacts

TANGRA collaboration,                   tangra.collaboration@ mail.ru
Leader: Y.N. Kopatch,                     kopatch@ nf.jinr.ru
Deputy: V.M. Bystrytsky,                 bystvm@ jinr.ru
Coordinator: I.N. Ruskov,                ivan.n.ruskov@ gmail.com
Address: Frank Laboratory of Neutron Physics (FLNF), Joint Institute for Nuclear Research (JINR), Joliot Curie str. 6, 141980 Dubna, Moscow region, Russia

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