摘要:
A radioisotope is produced through any of the following reactions using a target material: (1) (n, 2n) reaction: two-neutron pickup reaction induced by neutrons, (2) (n, 3n) reaction: three-neutron pickup reaction induced by neutrons, (3) (n, n′) reaction: neutron inelastic scattering reaction, (4) (n, p) reaction: one proton-pickup reaction induced by neutrons, (5) (n, np) reaction: one neutron- and one proton-pickup reaction induced by neutrons, (6) (n, 4He) reaction: one 4He-pickup reaction induced by neutrons.
摘要:
A germanium detector measures an energy spectrum of gamma ray flux. The detector includes a copper cooling layer continuous over a periphery of the columnar germanium crystal. The cooling layer reduces current leakage induced by heat, so that high energy gamma rays can be precisely detected. A combination of a plurality of germanium crystal bodies connected one another to form the germanium crystal of at least 20 cm leads to a more precise detection of high energy gamma rays.
摘要:
A clinical thermometer for detecting an infrared ray radiated from a tympanic membrane eliminates thermometric errors caused by differences from one patient to another and variations in thermometric operations, to always perform stable, accurate thermometry. A clinical thermometer converts infrared radiation from a substantially tympanic membrane into an electrical signal to perform temperature detection, the thermometer including an almost cylindrical probe body. A constricted diameter portion formed at one end of the probe body can be inserted into an external auditory meatus and deformed so as to conform to a shape of the external auditory meatus. An infrared sensor incorporated in the constricted diameter portion is thereby arranged to receive radiation from the tympanic membrane.
摘要:
Tuning indicator apparatus is provided for use with a frequency synthesizer tuner of the type having a phase-locked loop including a reference oscillator, a variable frequency oscillator to produce a local oscillating signal, a programmable frequency divider coupled to the variable frequency oscillator for dividing the frequency of the local oscillating signal by a variable dividing ratio to produce a frequency-divided oscillating signal, a phase comparator for comparing the frequency-divided oscillating signal to the output of the reference oscillator to produce an error signal, and a feedback circuit for feeding back the error signal from the phase comparator to the variable frequency oscillator to adjust the frequency of the local oscillating signal and thereby establish a tuning condition of the tuner. The tuning indicator apparatus includes a counter for counting counter pulses supplied thereto, the count of this counter determining the dividing ratio of the programmable frequency divider. An indicating circuit is responsive to a change in at least a predetermined value of the count of this counter to indicate that the count has changed and, thus, that the tuning condition of the tuner has changed. In a preferred embodiment, a sound generator is provided to generate an audible indication of a change in the tuning condition.
摘要:
In a ringing-tone control device for a telephone set, an audio signal which is sent from a communication opposite party is converted into a corresponding bi-level signal. The bi-level signal is stored into the memory. The bi-level signal is read out from the memory. A ringing tone is generated in response to the bi-level signal read out from the memory.
摘要:
An ultrasonic imaging apparatus comprises an ultrasonic probe, a transmitter/receiver circuit for driving the ultrasonic probe to emit an ultrasonic beam and processing an echo signal output from the ultrasonic probe and junction unit coupled between the ultrasonic probe and the transmitter/receiver circuit and including an impedance transforming circuit having a high input impedance and a low output impedance for taking in an echo signal output from the ultrasonic probe at high impedance and outputting the taken-in echo signal at low impedance.
摘要:
An ear-type thermometer which measures body temperature using a temperature detection element 21 that detects ambient temperature and an infrared detection element 22 that detects infrared radiation from a measurement site within the aural cavity, the 2 elements housed in a probe 3, wherein the ear-type thermometer comprises a probe cover 10 which can be detachably provided with the probe, a detection switch 60 which detects that the probe cover is attached or detached to the probe, and two temperature conversion coefficients 52a and 52b which corrects body temperature based on the detection result from the two detection elements. Further, the thermometer comprises a detection switch 60 which detects that the probe cover is attached or detached to and from the probe, a temperature conversion coefficient 52a which corrects body temperature based on detection results from the two detection elements, a control unit 50 which determines whether the probe cover has exceeded the usage count limit or not using an actual usage count, a speaker 12 or a liquid crystal display unit which alerts need to replace the probe cover when the usage count limit has been exceeded.
摘要:
An ear-type thermometer which measures body temperature using a temperature detection element 21 that detects ambient temperature and an infrared detection element 22 that detects infrared radiation from a measurement site within the aural cavity, the 2 elements housed in a probe 3, wherein the ear-type thermometer comprises a probe cover 10 which can be detachably provided with the probe, a detection switch 60 which detects that the probe cover is attached or detached to the probe, and two temperature conversion coefficients 52a and 52b which corrects body temperature based on the detection result from the two detection elements. Further, the thermometer comprises a detection switch 60 which detects that the probe cover is attached or detached to and from the probe, a temperature conversion coefficient 52a which corrects body temperature based on detection results from the two detection elements, a control unit 50 which determines whether the probe cover has exceeded the usage count limit or not using an actual usage count, a speaker 12 or a liquid crystal display unit which alerts need to replace the probe cover when the usage count limit has been exceeded.
摘要:
In a heat exchanger having a side plate for reinforcing a core portion, after an elastic support member for supporting the core portion is inserted between opposite walls of the side plate, a part of the opposite walls having a slit portion is plastically deformed at a position around the slit to form a protrusion. The protrusion protrudes toward the support member to be engaged with a recess of the elastic support member. Further, the silt is provided to penetrate through each opposite wall without being opened to an outer peripheral end of the side plate. Accordingly, the support member can be readily attached to the side plate, while it can prevent the side plate from being deformed in a brazing.
摘要:
A germanium detector measures an energy spectrum of a gamma ray flux. The detector includes a cooling layer continuous over a periphery of the columnar germanium crystal. The cooling layer reduces current leakage induced by heat, so that high energy gamma rays can be precisely detected. A combination of a plurality of germanium crystal bodies connected one another to form the germanium crystal of at least 20 cm leads to a more precise detection of high energy gamma rays. A method for determining a photonuclear reaction cross section using the germanium detector enables measurement of the energy dependence of a photonuclear reaction cross section at high resolution. The method employs a white gamma ray flux radiated to a nuclide. The germanium detector measures the spectrum of a transmission gamma ray flux transmitted through the nuclide. Peaks are specified in the obtained spectrum. An atomic nucleus can be transformed using a monochromatic gamma ray flux having an energy level corresponding to the peak.