Neutron Time-of-Flight Spectroscopy

نویسندگان

  • John R. D. Copley
  • Terrence J. Udovic
چکیده

The time-of-flight technique is employed in two of the instruments at the NIST Cold Neutron Research Facility (CNRF). A pulsed monochromatic beam strikes the sample, and the energies of scattered neutrons are determined from their times-of-flight to an array of detectors. The time-of-flight method may be used in a variety of types of experiments such as studies of vibrational and magnetic excitations, tunneling spectroscopy, and quasielastic scattering studies of diffusional behavior; several examples of experiments are discussed. We also present brief descriptions of the CNRF time-of-flight instruments, including their modi operandi and some of their more pertinent parameters and performance characteristics.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Neutron resonance spectroscopy at n TOF at CERN

Neutron resonance spectroscopy plays an important role in the investigation of neutron induced reaction cross sections and nuclear structure in the MeV excitation range. Neutron time-of-flight facilities are the most used installations to explore neutron resonances. In this paper we describe the basic features of neutron resonance spectroscopy together with recent results from the time-of-fligh...

متن کامل

ExploStudy, Final Report, 17/2/2001

2.1. X-ray Based Detection Systems: 11 2.2. Elements of Neutron Physics and Properties: 13 2.3. Gamma Spectroscopy Neutron Based Techniques: 14 2.3.1. Thermal Neutron Analysis (TNA): 17 2.3.2. Fast Neutron Analysis (FNA): 19 2.3.3. Pulsed Fast Neutron Analysis (PFNA): 19 2.3.4. Pulsed Fast-Thermal Neutron Analysis (PFTNA): 20 2.3.5. Associated (Alpha) Particle – Time-of-Flight Neutron Analysis ...

متن کامل

“Neutron Shell”: A high efficiency array of neutron detectors for γ−ray spectroscopic studies with Gammasphere

A shell of neutron detectors was designed, constructed, and employed in γ−ray spectroscopy with Gammasphere. It consists of up to 35 tapered regular hexagons that replace the same number of forward Ge-detector modules in Gammasphere. The shell was designed for high detection efficiency and very good neutron−γ discrimination. The simultaneous use of time of flight, and two methods of pulse shape...

متن کامل

NUCLEAR ENERGY AGENCY Organisation for Economic Co-operation and Development Nuclear MeasureMeNts, evaluatioNs aNd applicatioN

The design of Generation IV nuclear reactors and the research of new fuel cycles require knowledge of cross-sections for different nuclear reactions. Our work is focused on the determination of the cross-sections of (n,xng) reactions occurring in these new reactors. The aim is to measure unknown cross-sections and to reduce uncertainty on present data relative to reactions and isotopes present ...

متن کامل

Body composition to climate change studies – the many facets of neutron induced prompt gamma-ray analysis

In-vivo body composition analysis of humans and animals and in-situ analysis of soil using fast neutron inelastic scattering and thermal neutron capture induced prompt-gamma rays have been described. By measuring carbon (C), nitrogen (N) and oxygen (O), protein, fat and water are determined. C determination in soil has become important for understanding below ground carbon sequestration process...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره 98  شماره 

صفحات  -

تاریخ انتشار 1993