HPGe detector efficiency calibration for extended cylinder and marinelli-beaker sources using the ESOLAN program

A hybrid analytical-numerical method for efficiency calculations of spherical scintillation NaI(Tl) detectors and arbitrarily located point sources

“…There fore, the un der stand ing of the full scope of the mul ti di men sional cal i bra tion and mea sure ment process must be done with a good ac cu racy even if the detec tor de sign seems less com plex at first. In gamma ray spec trom e try, know ing the solid an gle W is the most impor tant and widely used to cal i brate the dif fer ent de tectors and de ter mine their var i ous ef fi cien cies (geo met rical, to tal and full-en ergy peak) [1][2][3][4][5][6][7][8][9][10][11][12]. Typ i cally, the ex per i men tal cal i bra tion pro cess for the gamma-ray detec tors is not easy, due to the fact that it is a hard work to ob tain the ex actly cal i brated g-sources of var i ous shapes and me dium [13][14][15].…”

“…Typ i cally, the ex per i men tal cal i bra tion pro cess for the gamma-ray detec tors is not easy, due to the fact that it is a hard work to ob tain the ex actly cal i brated g-sources of var i ous shapes and me dium [13][14][15]. There fore, there are many re ports which were done and de vel oped for gamma-spectrometries mea sure ment sys tems, where some of them used Monte Carlo, semi-em pir i cal, di rect math e mat i cal and ef fi ciency trans fer method in this cali bra tion pro cess [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. The geo met ri cal solid an gle, W, cal cu la tion was pre sented by an iso tro pic ra di at ing g-ray source, for any given de tec tor shape is looked to be the most dif fi cult step [15][16][17][18][19].…”

Empirical formulae for calculating γ-ray detectors effective solid angle ratios

“…This method is tedious and time consuming process. In order to overcome the problems of the experimental method, several non-experimental methods [2][3][4][5][6] have been proposed and applied, depending on the photon energy, source-to-detector geometry and volume. One of the most common approaches is called the ef iciency transfer method.…”

Calculation of NaI(Tl) detector full-energy peak efficiency using the efficiency transfer method for small radioactive cylindrical sources

“…It re quires a large num ber of ra dio ac tive stan dards, im plying a high fi nan cial cost, along with count ing time and a lot of ef fort in pre par ing the sources [3]. In or der to over come the said ob sta cles, sev eral non-ex per i men tal meth ods [4][5][6][7][8][9][10][11][12] have been pro posed and ap plied, de -pend ing on pho ton en ergy, source-de tec tor ge om e try and vol ume. Also, Selim and Abbas over came these hur dles by de riv ing a di rect math e mat i cal method for ob tain ing the ef fi cien cies of source-de tec tor sys tems with dif fer ent ge om e tries such as point source [13,14], disk source [15,16], cy lin dri cal source [17], Marinelli beaker [18], parallelepiped [19], and well-type de tectors [20].…”