TANGRA facility

Responsible for the facility:
Yury Kopatch
e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
tel. +7 (496) 216-24-59
Nikita Fedorov
e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
tel. +7 (496) 216-27-73

The facility has been designed and develops within the framework of the "TANGRA" (TAgged Neutrons and Gamma RAys) project implemented at FLNP and is aimed at studying the neutron nuclear interaction using the tagged neutron method (TNM). The binary reaction d(t, 4He)n is used as a neutron source with an energy of 14,1 MeV. The main component of the TNM is the registration of the characteristic gamma rays from inelastic neutron scattering on the test sample in coincidence with alpha particles registered using a position-sensitive alpha detector installed in the neutron generator chamber.

I. TANGRA facility configurations

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).

TANGRA

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

Sample environment

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

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

In 2023-2025, a publicly accessible database containing the results of measurements of the integrated cross sections for the production of characteristic gamma radiation emitted in reactions induced by 14.1 MeV neutrons on the nuclei of various elements was created as part of RSF project 23-12-00239. It is publicly available in SQLite format at link. Currently, it contains experimental information on the integrated cross sections and Legendre polynomial expansion coefficients for 59 elements and 525 individual gamma lines. All data was measured as part of the RSF project. Separate files, report.pdf and DataBaseDescription.pdf, are available along with the database. The first file provides a detailed description of the experimental setup and data analysis procedure, as well as information on the observed transitions, integrated emission cross sections of individual gamma lines, and normalized Legendre polynomial expansion coefficients. The second file provides a detailed description of the database structure.

III. Contacts

TANGRA - This email address is being protected from spambots. You need JavaScript enabled to view it.

Leader: Yu.N. Kopatch - This email address is being protected from spambots. You need JavaScript enabled to view it.

Deputy leader: N.A. Fedorov - This email address is being protected from spambots. You need JavaScript enabled to view it.

Coordinator: I.N. Ruskov - This email address is being protected from spambots. You need JavaScript enabled to view it.

*Testing mode