Point-of-sale system that measures radioactivity of a product

1. A point of sale (POS) system, comprising:

a memory configured to store a price look up (PLU) file, wherein the PLU file is registered with a product code for identifying a product and a radioactivity threshold which is the product information defined for each product code in association with each other;

a bagging counter to place the product;

a scanning window fixed to the bagging counter;

a barcode scanner configured to generate a scanning light and to read, via the scanning window, the product code from a barcode attached to the product;

a radioactivity measurement part configured to measure, via the scanning window, radioactivity of the product based on a radiation dose emitted from the product placed on the bagging counter;

a processor configured to compare the radioactivity threshold which is associated with the product code read by the barcode scanner and which is acquired from the PLU file with a radioactivity measurement value measured by the radioactivity measurement part;

an alarm output part configured to output an alarm when the radioactivity measurement value exceeds the radioactivity threshold; and

wherein the barcode scanner and the radioactivity measurement part are arranged on one and another ends of a lower side of the scanning window, respectively,

wherein the radioactivity measurement part is arranged at such a position that, when the product exists at a scanning position where the product code is read with the barcode scanner, the radioactivity measurement part detects the radioactivity of the product,

wherein the radioactivity measurement part is a dosimeter which detects β rays;

wherein the dosimeter is fixed to the bagging counter at a location remote from the barcode scanner, and

wherein the scanning window is made of a light-transmissive member so as to transmit the scanning light and the β rays.

2. The POS system according to claim 1 , further comprising:

a user input interface configured to receive an input of a quantity of the product,

wherein, in response to the product being measured by the radioactivity measurement part at substantially a same time as a quantity being inputted via the user interface, the processor invalidates the input quantity.

3. The POS system according to claim 1 , wherein the alarm output part comprises a display configured to display the alarm.

4. The POS system according to claim 1 , wherein the alarm output part comprises a display having a speaker configured to output a sound for the alarm.

5. A method of detecting radioactivity of a product in a point of sale (POS) system, comprising:

storing, in a memory, a price look up (PLU) file, where the PLU file is registered with a product code for identifying a product and a radioactivity threshold which is product information defined for each product code in association with each other;

reading, by a barcode scanner through a scanning window fixed to a bagging counter, the product code from a barcode attached to the product;

measuring, by a radioactivity measurement part through the scanning window, radioactivity of the product based on a radiation dose emitted from the product placed on the bagging counter;

comparing, by a processor, the radioactivity threshold which is associated with the product code read by the barcode scanner and which is acquired from the PLU file with a radioactivity measurement value measured by the radioactivity measurement part; and

outputting an alarm based on the comparison,

wherein, in response to the measurement value exceeding the radioactivity threshold, the alarm is output via one of a speaker and a display, and

wherein the measuring of the radioactivity of the product and the reading of the barcode of the product are performed at substantially a same time,

wherein the barcode scanner and the radioactivity measurement part are arranged on one and another ends of a lower side of the scanning window, respectively,

wherein the radioactivity measurement part is a dosimeter which detects β rays,

wherein the dosimeter is fixed to the bagging counter at a location remote from the barcode scanner, and

wherein the scanning window is made of a light-transmissive member so as to transmit a scanning light of the barcode scanner and the β rays.