Determination of neutron fracture functions from a global QCD analysis of the leading neutron production at HERA

The last two decades have seen a growing trend towards the experimental efforts at the electron-proton collider HERA in which have collected high precision data on the spectrum of leading neutron (LN) and leading-proton (LP) carrying a large fraction of the proton’s energy. In our recent study [Phys. Rev. D 95 (2017), 074011], we have proposed an approach based on the Fractures Functions (FF) formalism and have extracted the neutron Fracture Functions (neutron FFs) from a global QCD analysis of LN production data measured by H1 and ZEUS collaborations at HERA. We have shown that considering the approach based on the framework of Fracture Functions, one could phenomenologically parametrize the neutron FFs at the input scale. In order to access the uncertainties for the obtained neutron FFs as well as the LN structure functions and cross section, associated with the uncertainties in the data, we have made an extensive use of the “Hessian method”. Our theory predictions based on the obtained neutron FFs are in satisfactory agreement with all LN data analyzed, for a wide range of [Formula: see text] and [Formula: see text].

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Determination of the strange quark content of the nucleon from a next-to-leading-order QCD analysis of neutrino charm production

Zeitschrift für Physik C Particles and Fields ◽

10.1007/bf01571875 ◽

1995 ◽

Vol 65 (2) ◽

pp. 189-198 ◽

Cited By ~ 195

Author(s):

◽

A. O. Bazarko ◽

C. G. Arroyo ◽

K. T. Bachmann ◽

T. Bolton ◽

...

Keyword(s):

Strange Quark ◽

Charm Production ◽

Leading Order ◽

Qcd Analysis ◽

Quark Content

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RADIONUCLIDE CHARACTERISTICS OF RDE SPENT FUELS

JURNAL TEKNOLOGI REAKTOR NUKLIR TRI DASA MEGA ◽

10.17146/tdm.2018.20.2.4101 ◽

2018 ◽

Vol 20 (2) ◽

pp. 69 ◽

Cited By ~ 2

Author(s):

Ihda Husnayani ◽

Pande Made Udiyani

Keyword(s):

Thermal Power ◽

Neutron Production ◽

Cooling Time ◽

Spent Fuel ◽

Release Rates ◽

Radiation Dose Rate ◽

The Core ◽

Spent Fuel Storage ◽

Fuel Storage

Reaktor Daya Eksperimental (RDE) is a 10 MWth pebble-bed High Temperature Gas-cooled Reactor that is planned to be constructed by National Nuclear Energy Agency of Indonesia (BATAN) in Puspiptek complex, Tangerang Selatan. RDE utilizes low enriched UO2 fuel coated by TRISO layers and loaded into the core by means of multipass loading scheme. Determination of radionuclide characteristics of RDE spent fuel; such as activity, thermal power, neutron and photon release rates; are very important because those characteristics are crucial to be used as a base for evaluating the safety of spent fuel handling system and storage tank. This study is aimed to investigate the radionuclide characteristics of RDE spent fuel at the end of cycle and during the first 5 years cooling time in spent fuel storage. The method used to investigate the radionuclide characteristics is burnup calculation using ORIGEN2.1 code. In performing the ORIGEN2.1 calculation, one pebble fuel was assumed to be irradiated in the core for 5 cycles and then decayed for 5 years. At the end of the fifth cycle, it is obtained that the total activity, thermal power, neutron production, and photon release rates from all radionuclides inside one spent fuel are approximately 105.68 curies, 0.41 watts, 2.65 x 103 neutrons/second, and 1.79 x 104 photons/second, respectively. The results for the radionuclides characteristics during the first 5 years cooling time in the spent fuel storage show that the radioactivity characteristics from all radionuclides are rapidly decreasing at the first year and then slowly decreasing at the second until the fifth year of cooling time. The results obtained in this study can provide data for safety evaluation of fuel handling and spent fuel storage, such as the calculation of sourceterm, radiation dose rate, and the determination of radiation shielding.Keywords: RDE, spent fuel, radionuclide activity, thermal power, neutron production, photon releaserates KARAKTERISTIK RADIONUKLIDA DI DALAM BAHAN BAKAR RDE. Reaktor Daya Eksperimental (RDE) adalah reaktor tipe Reaktor Temperatur Tinggi Berpendingin Gas dengan daya termal 10MW yang akan dibangun oleh BadanTenagaNuklirNasional (BATAN) di kawasanPuspiptek, Tangerang Selatan. RDE menggunakan bahan bakar UO2 yang dilapisi dengan lapisan TRISO dan dimasukkan ke dalam teras RDE menurut skema multipass (5 siklus). Penentuan karakteristik radionuklida di dalam bahan bakar RDE; seperti aktivitas, daya termal, laju produksi neutron dan pelepasan foton; adalah sangat penting karena informasi karakteristik ini diperlukan sebagai dasar untuk melakukan evaluasi keselamatan system penanganan dan penyimpanan bahan bakar bekas. Penelitian ini bertujuan untuk menganalisis karakteristik radionuklida bahanbakar RDE setelah 5 siklus dan pada 5 tahun pertama pendinginan ditempat penyimpanan bahan bakar bekas. Metode yang digunakan dalam menghitung karakteristik radionuklida adalah menggunakan program ORIGEN2.1. Satu bola bahan bakar RDE diasumsikan diiradiasi selama 5 siklus dan kemudian meluruh selama 5 tahun. Pada akhir siklus, diperoleh hasil aktivitas total, daya termal, laju produksi neutron dan pelepasan foton dari seluruh radionuklida di dalam satu bola bahan bakar RDE sebesar 105,68 curies, 0,41 watts, 2,65 x 103 neutron/detik, dan 1,79 x 104 foton/detik. Hasil untuk karakteristik radionuklida selama 5 tahun penyimpanan menunjukkan bahwa karakteristik radioktivitas radionuklida menurun dengan cepat pada tahun pertama dan kemudian menurun lebih lambat pada tahun kedua hingga tahun kelima. Hasil perhitungan karakteristik radionuklida dari penelitian ini dapat digunakan sebagai basis untuk analisis keselamatan penanganan dan penyimpanan bahan bakarbekas RDE.Kata kunci:RDE, bahan bakar bekas, aktivitas radionuklida, daya termal, produksi neutron, laju foton

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H1 INCLUSIVE CROSS-SECTION MEASUREMENTS AND AN EXTRACTION OF PARTON DISTRIBUTION FUNCTIONS

Modern Physics Letters A ◽

10.1142/s0217732305017706 ◽

2005 ◽

Vol 20 (21) ◽

pp. 1557-1571

Author(s):

BURKARD REISERT

Keyword(s):

Cross Section ◽

Parton Distribution ◽

Inclusive Cross Section ◽

Distribution Functions ◽

Parton Distribution Functions ◽

Single Experiment ◽

Parton Distributions ◽

The Standard Model ◽

Qcd Analysis

An extraction of the parton distributions of the proton by a next-to-leading order QCD fit in the framework of the Standard Model is presented. The fit implements a novel decomposition of the quark species into up- and down-type quark distributions, which is the key to enable a determination of flavor separated parton distributions from a single experiment. The fit is performed on the inclusive unpolarized neutral and charged current cross-section measurements by the H1 collaboration at HERA. The discussion of uncertainties of parton distribution functions is based upon but extends the QCD analysis published together with the H1 data.

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Measurements of leading neutron production in polarized pp collisions at RHIC-PHENIX

10.1063/1.3122165 ◽

2009 ◽

Author(s):

Manabu Togawa ◽

Roberto Fiore ◽

Igor Ivanov ◽

Alessandro Papa ◽

Jacques Soffer ◽

...

Keyword(s):

Neutron Production ◽

Pp Collisions ◽

Leading Neutron

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DETERMINATION OF THE STRONG COUPLING CONSTANT FROM NLO QCD ANALYSIS OF PROTON STRUCTURE FUNCTION

International Journal of Modern Physics A ◽

10.1142/s0217751x11052396 ◽

2011 ◽

Vol 26 (03n04) ◽

pp. 658-659 ◽

Cited By ~ 3

Author(s):

H. KHANPOUR ◽

ALI N. KHORRAMIAN ◽

S. ATASHBAR TEHRANI

Keyword(s):

Structure Function ◽

Perturbative Qcd ◽

Strong Coupling ◽

Distribution Functions ◽

Strong Coupling Constant ◽

Proton Structure Function ◽

Coupling Constant ◽

Proton Structure ◽

Qcd Analysis

In this article we present a determination of the strong coupling constant and parton distribution functions (PDFs) based on a next-to-leading order (NLO) perturbative QCD analysis of proton structure function. More precisely, we extract [Formula: see text] and PDFs by fitting perturbative QCD predictions to the data from the measurements of the proton structure function [Formula: see text] in deep inelastic scattering, which are based on perturbative QCD calculations up to NLO. We obtain at NLO [Formula: see text] in the variable-flavor number scheme.

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